Todas las herramientas
La biblioteca completa
343 calculadoras y herramientas en el navegador en 18 categorías — privadas y gratuitas.
AI Tools
8 activasAI Token Counter
Count estimated tokens, characters, words, sentences, and timing for leading AI models.
AI Cost Calculator
Estimate input, output, daily, and monthly API costs from your prompt.
Context Window Calculator
See how much of each model’s context window your prompt uses.
Token Visualizer
Explore a local approximation of how text becomes model tokens.
Prompt Analyzer
Inspect prompt complexity, structure, placeholders, code, and more—privately.
AI Model Comparison
Compare context, output limits, pricing, vision, and tool support.
Prompt Size Estimator
Translate prompt length into words, tokens, pages, and reading time.
AI Pricing Calculator
Forecast monthly API budgets across major AI providers.
Salud
21 activasCalculadora de IMC
Body Mass Index from height and weight.
Calculadora de grasa corporal
Estimate body fat with the U.S. Navy method.
Calculadora de masa magra
Fat-free mass from height and weight.
Calculadora de FFMI
Fat-free mass index for athletes.
Calculadora de peso ideal
Reference weight ranges by height.
Calculadora de TMB
Basal metabolic rate at rest.
Calculadora de TDEE
Total daily energy expenditure.
Calculadora de calorías
Daily calorie needs by activity level.
Calculadora de déficit calórico
Targets for gradual weight change.
Calculadora de proteínas
Daily protein target in grams.
Calculadora de macronutrientes
Protein, carbs and fat targets.
Calculadora de agua diaria
Daily hydration target.
Calculadora de ritmo
Pace, distance and finish time.
Calculadora de zonas de frecuencia cardíaca
Five training zones from max HR.
Calculadora de embarazo
Weeks pregnant and trimester.
Calculadora de aumento de peso en el embarazo
Reference weight-gain range by pre-pregnancy BMI.
Calculadora de fecha probable de parto
Estimated due date from LMP.
Calculadora de fecha de concepción
Estimated conception date.
Calculadora de ovulación
Estimated fertile window.
Calculadora de periodo
Estimate your next period from cycle length.
Relación cintura-cadera
Body-shape health indicator.
Animales
18 activasCalculadora de embarazo felino
Estimated feline due date.
Calculadora de gestación bovina
Estimated calving date.
Calculadora de embarazo canino
Estimated canine due date.
Calculadora de gestación caprina
Estimated kidding date.
Calculadora de embarazo de cobaya
Estimated guinea pig due date.
Calculadora de gestación equina
Estimated foaling date.
Calculadora de embarazo de llama
Estimated llama due date.
Calculadora de gestación de conejo
Estimated rabbit due date.
Calculadora de gestación ovina
Estimated lambing date.
Calculadora de gestación porcina
Estimated farrowing date.
Calculadora de ganado por hectárea
Estimate herd capacity from available forage.
Calculadora de índice de conversión alimenticia
Feed used per unit of weight gained.
Calculadora de silo de grano
Round-bin storage capacity estimate.
Calculadora de tasa de mortalidad animal
Deaths as a percentage of a herd or flock.
Calculadora de peso equino
Estimate adult horse body weight from measurements.
Registro de peso canino
Record and compare measured dog weights.
Registro de peso felino
Record and compare measured cat weights.
Calculadora de peso bovino
Estimate cattle weight from body measurements.
Finanzas
16 activasCalculadora de hipoteca
Monthly payment and total interest.
Calculadora de préstamo
Personal loan payment estimate.
Calculadora de préstamo para coche
Car payment estimate.
Calculadora de cuota
Payment from principal, rate and term.
Calculadora de amortización
Full loan amortization schedule.
Calculadora de interés compuesto
Growth with compounding.
Calculadora de inversión
Future value of investments.
Calculadora de jubilación
Retirement savings projection.
Calculadora de meta de ahorro
Time to reach a savings target.
Calculadora de inflación
Purchasing power over time.
Calculadora de salario
Annual salary from hourly rate.
Calculadora de salario a hora
Hourly rate from annual salary.
Calculadora de asignación presupuestaria
Split income into needs, wants, savings.
Calculadora de patrimonio neto
Assets minus liabilities.
Calculadora de amortización de deuda
Time to pay off debt.
Calculadora de pago de tarjeta
Payoff time and interest.
Finanzas islámicas
9 activasCalculadora general de Zakat
Zakat on combined assets.
Calculadora de Zakat en efectivo
Zakat on cash holdings.
Calculadora de Zakat sobre oro
Zakat on gold you enter by weight.
Calculadora de Zakat sobre plata
Zakat on silver you enter by weight.
Calculadora de Zakat comercial
Zakat on business assets.
Calculadora de Zakat sobre inversiones
Zakat on investments.
Calculadora de Nisab
Nisab threshold from gold or silver.
Calculadora de Fidya
Fidya for missed fasts.
Calculadora de herencia islámica
Organise heirs and estate for Faraid review.
Matemáticas
7 activasCalculadora de porcentajes
Find percentages and changes.
Calculadora de fracciones
Add and multiply fractions.
Calculadora científica
Basic expressions in the browser.
Calculadora de media
Mean of a set of numbers.
Calculadora de razones
Split a total by ratio.
Calculadora de triángulos
Area and perimeter of triangles.
Generador de números aleatorios
Random integers or decimals.
Fecha y hora
7 activasCalculadora de edad
Exact age from date of birth.
Calculadora de diferencia de fechas
Days between two dates.
Calculadora de fechas
Add or subtract days from a date.
Calculadora de duración de tiempo
Duration between times.
Calculadora de horas
Total hours from time entries.
Calculadora de días laborables
Weekdays between dates.
Calculadora de cuenta atrás
Time until a target date.
Educación
5 activasConversores
12 activasConversor de longitud
Meters, feet, miles and more.
Conversor de peso
Kilograms, pounds and ounces.
Conversor de temperatura
Celsius, Fahrenheit, Kelvin.
Conversor de área
Square meters, acres, hectares.
Conversor de volumen
Liters, gallons, cups.
Conversor de velocidad
mph, km/h, m/s, knots.
Conversor de energía
Joules, calories, kWh.
Conversor de tiempo
Seconds, minutes, hours, days.
Conversor de consumo de combustible
MPG and L/100km.
Conversor de cocina
Cups, tablespoons, milliliters.
Conversor manual de tipo de cambio
Convert with a rate you enter.
Conversor de almacenamiento de datos
Bytes, KB, MB, GB, TB.
Hogar
18 activasCalculadora de hormigón
Volume for slabs and footings.
Calculadora BTU
Estimate room cooling capacity.
Calculadora de metros cuadrados
Find room or project area.
Calculadora de escaleras
Plan risers, treads and run.
Calculadora de pintura
Liters or gallons needed.
Calculadora de baldosas
Tiles needed for a floor.
Calculadora de suelos
Flooring boxes needed.
Calculadora de grava
Gravel volume and tonnage.
Calculadora de tejados
Shingle bundles needed.
Calculadora de papel pintado
Rolls needed for walls.
Calculadora de mulching
Mulch volume for garden beds.
Calculadora de espaciado de plantas
Plan plants from area and spacing.
Calculadora de compost
Compost volume for a bed.
Calculadora de fertilizante
Product amount from a nutrient target.
Calculadora de sustrato para macetas
Potting-mix volume for round pots.
Calculadora de tierra para huertos elevados
Soil mix volume for raised beds.
Calculadora de semillas de hortalizas
Seeds needed for rows and germination.
Calculadora de rendimiento de hortalizas
Estimate harvest from plant count.
Herramientas de desarrollador
29 activasConvertidor de timestamp Unix
Unix time to readable date.
Convertidor de epoch
Epoch seconds and milliseconds.
Generador de contraseñas
Secure random passwords.
Comprobador de fortaleza de contraseña
Check password strength locally.
Generador de hashes
SHA-256, SHA-384, SHA-512.
Formateador JSON
Pretty-print JSON.
Validador JSON
Validate JSON syntax.
Minificador JSON
Compress JSON to one line.
Embellecedor JSON
Beautify and indent JSON.
Decodificador JWT
Decode JWT header and payload.
Generador UUID
Generate UUID v4.
Validador UUID
Validate UUID format.
Codificador y decodificador Base64
Encode and decode Base64.
Codificador y decodificador URL
Percent-encode and decode URLs.
Formateador HTML
Indent HTML markup.
Formateador CSS
Format CSS stylesheets.
Formateador SQL
Format SQL queries (never executed).
Formateador XML
Indent XML documents.
Formateador YAML
Clean up YAML formatting.
Probador de expresiones regulares
Test JavaScript regular expressions.
Vista previa Markdown
Preview Markdown as HTML.
Analizador de expresiones cron
Parse cron schedule fields.
Calculadora de subred
Hosts in a CIDR block.
Búsqueda de tipos MIME
Common MIME type descriptions.
Búsqueda de códigos de estado HTTP
HTTP status code meanings.
Convertidor de colores
HEX, RGB and HSL.
Generador de códigos QR
Make a QR code from text or a URL.
Convertidor CSV ↔ JSON
Convert tabular data locally.
Comparador de diferencias de texto
Compare two pieces of text.
Herramientas PDF
Merge, split, sign and convert PDFs.
Unir PDF
Combine PDF files into one document.
Dividir PDF
Split a PDF into individual page files.
Firmar PDF
Add a styled name or signature image to a PDF.
PDF a imagen
Convert each PDF page to a PNG image.
Imagen a PDF
Turn multiple images into one PDF.
RTF a PDF
Convert RTF documents to PDF.
RTF a Word
Convert RTF documents to Word.
Word a PDF
Convert Word DOCX documents to PDF.
Texto PDF a DOCX
Extract text from a PDF into a Word DOCX file.
Imagen
2 activasQuímica
29 activasCalculadora de moles
Convert between moles, particles, and mass.
Calculadora de masa molar
Find molar mass from a chemical formula.
Calculadora de peso molecular
Compute molecular weight of any compound.
Calculadora de gramos a moles
Convert a mass in grams to moles.
Calculadora de moles a gramos
Convert moles to mass in grams.
Calculadora de porcentaje en masa
Find mass percent composition of a compound.
Calculadora de rendimiento porcentual
Compare actual vs. theoretical yield.
Calculadora de fórmula empírica
Derive the simplest whole-number ratio.
Calculadora de fórmula molecular
Find the true molecular formula from empirical data.
Calculadora de reactivo limitante
Identify the limiting reagent in a reaction.
Calculadora de molaridad
Calculate molarity from moles and volume.
Calculadora de molalidad
Express concentration as moles per kilogram.
Calculadora de normalidad
Find normality for acid-base and redox work.
Calculadora de dilución
Use C₁V₁ = C₂V₂ to dilute stock solutions.
Calculadora de concentración de disolución
Convert between common concentration units.
Calculadora de la ley de gases ideales
Solve PV = nRT for any variable.
Calculadora de la ley de Boyle
Relate pressure and volume at constant temperature.
Calculadora de la ley de Charles
Relate volume and temperature at constant pressure.
Calculadora de la ley combinada de los gases
Link P, V, and T when moles are constant.
Calculadora de la ley de Gay-Lussac
Relate pressure and temperature at constant volume.
Calculadora de la ley de Dalton
Find partial pressures in gas mixtures.
Calculadora de calor específico
Compute q = mcΔT for heating or cooling.
Calculadora de capacidad calorífica
Find heat capacity from mass and specific heat.
Calculadora de entalpía
Estimate ΔH from bond energies or Hess's law.
Calculadora de energía libre de Gibbs
Determine spontaneity with ΔG = ΔH − TΔS.
Calculadora de configuración electrónica
Write full and noble-gas electron configurations.
Calculadora de masa atómica
Weighted average atomic mass from isotopes.
Calculadora de isótopos
Compare isotope numbers and neutron counts.
Calculadora de vida media
Model radioactive decay over time.
Física
35 activasCalculadora de velocidad
Find velocity from displacement and time.
Calculadora de rapidez
Find speed from distance and time.
Calculadora de velocidad media
Mean speed over multiple segments.
Calculadora de aceleración
Rate of change of velocity over time.
Calculadora de distancia
Distance from speed and time or SUVAT.
Calculadora de tiempo
Time from distance and speed or acceleration.
Calculadora de caída libre
Motion under gravity near Earth's surface.
Calculadora de movimiento parabólico
Range, height, and flight time for projectiles.
Calculadora de fuerza
Compute force with F = ma.
Calculadora de peso (gravedad)
Gravitational weight from mass and g.
Calculadora de momento lineal
Linear momentum p = mv.
Calculadora de impulso
Impulse equals change in momentum.
Calculadora de par (torque)
Rotational force τ = rF sin θ.
Calculadora de energía cinética
Energy of motion: KE = ½mv².
Calculadora de energía potencial
Gravitational PE = mgh.
Calculadora de trabajo mecánico
Mechanical work W = Fd cos θ.
Calculadora de potencia
Power as work or energy per time.
Calculadora de energía mecánica
Total KE + PE in conservative systems.
Calculadora de eficiencia
Output vs. input energy or power.
Calculadora de la ley de Ohm
Relate voltage, current, and resistance.
Calculadora de voltaje
Find voltage from current and resistance.
Calculadora de corriente
Find current from voltage and resistance.
Calculadora de resistencia
Resistance from V/I or resistivity.
Calculadora de potencia eléctrica
Power in circuits: P = VI = I²R.
Calculadora de capacitancia
Charge storage Q = CV and parallel-plate C.
Calculadora de frecuencia
Frequency from period or wave speed.
Calculadora de longitud de onda
Wavelength from speed and frequency.
Calculadora de velocidad de onda
Speed of propagation v = fλ.
Calculadora de periodo
Period as the inverse of frequency.
Calculadora de lentes
Thin-lens equation and magnification.
Calculadora de ecuación del espejo
Spherical mirrors and ray diagrams.
Calculadora de refracción
Snell's law and index of refraction.
Calculadora de presión
Pressure as force per unit area.
Calculadora de densidad
Mass per unit volume ρ = m/V.
Calculadora de flotabilidad
Archimedes' principle and floating objects.
Estadística
29 activasCalculadora de media
Arithmetic average of a data set.
Calculadora de mediana
Middle value of sorted data.
Calculadora de moda
Most frequently occurring value.
Calculadora de rango
Spread from minimum to maximum.
Calculadora de varianza
Average squared deviation from the mean.
Calculadora de desviación típica
Typical distance from the mean.
Calculadora de cuartiles
Q1, Q2, and Q3 for any data set.
Calculadora de rango intercuartílico
IQR = Q3 − Q1 robust spread measure.
Calculadora de probabilidad
Basic probability rules and complements.
Calculadora binomial
Binomial probabilities and cumulative counts.
Calculadora de distribución normal
Z-scores and normal CDF probabilities.
Calculadora de Poisson
Rare events in fixed intervals.
Calculadora de combinaciones
n choose k unordered selections.
Calculadora de permutaciones
Ordered arrangements of k from n.
Calculadora de correlación
Pearson r between two variables.
Calculadora de regresión lineal
Best-fit line slope and intercept.
Calculadora de R²
Coefficient of determination R².
Calculadora de puntuación z
Standardize values to the z scale.
Calculadora de prueba z
One-sample z-test for known σ.
Calculadora de prueba t
One- and two-sample t-tests.
Calculadora de chi-cuadrado
Goodness-of-fit and independence tests.
Calculadora ANOVA
One-way analysis of variance F-test.
Calculadora de tamaño muestral
Plan n for a target margin of error.
Calculadora de margen de error
MOE from sample size and confidence.
Calculadora de intervalo de confianza
CI for a mean or proportion.
Calculadora de percentil
Find the kth percentile of data.
Calculadora de rango porcentual
Percentile rank of a given value.
Calculadora de riesgo relativo
Risk ratio for cohort studies.
Calculadora de muestra aleatoria
Draw a simple random sample.
Tierra y clima
20 activasCalculadora de antípoda
Find the point on Earth directly opposite any location.
Calculadora de distancia latitud-longitud
Great-circle distance between two coordinate pairs.
Calculadora de acimut
Initial bearing between two coordinates.
Calculadora de distancia ortodrómica
Shortest path distance over a sphere.
Calculadora de amanecer y atardecer
Approximate sun times for a location and day.
Calculadora de fase lunar
Moon phase and illumination for a date.
Calculadora de sensación térmica por viento
Feels-like temperature with wind (US formula).
Calculadora de índice de calor
Apparent temperature from heat and humidity.
Calculadora de punto de rocío
Dew point from temperature and humidity.
Calculadora de humedad
Relative humidity from temp and dew point.
Calculadora de lluvia
Rain volume from area and depth.
Calculadora de lluvia a nieve
Convert liquid rain to snow depth.
Calculadora de nevada
Snow depth from liquid equivalent.
Calculadora de índice UV
Estimated UV index from sun angle.
Calculadora de tiempo de quemadura solar
Minutes to burn by skin type and UV.
Calculadora de exposición solar
UV dose from UV index and duration.
Calculadora de grados-día de crecimiento
Heat accumulation for crops.
Calculadora de fecha de helada
Estimate first frost day of year.
Calculadora de densidad del aire
Density from temperature and pressure.
Calculadora de presión atmosférica
Pressure at altitude above sea level.
Comida
68 activasCalculadora de mantequilla
Convert butter between cups, grams, and sticks.
Convertidor de barras de mantequilla
Convert butter sticks to grams or cups.
Convertidor de moldes de pastel
Scale a recipe between pan sizes.
Convertidor de medidas de cocina
Convert cups, tablespoons, and teaspoons.
Convertidor de tazas a libras
Convert cups of an ingredient to pounds.
Convertidor de libras a tazas
Convert pounds of an ingredient to cups.
Convertidor de tazas a gramos
Convert cups to grams for baking.
Convertidor de gramos a tazas
Convert grams to cups for baking.
Convertidor de gramos a cucharadas
Convert grams to tablespoons.
Convertidor de gramos a cucharaditas
Convert grams to teaspoons.
Calculadora de ml a gramos
Convert milliliters to grams by density.
Convertidor de aceite a mantequilla
Substitute oil for butter in recipes.
Convertidor de conversión de arroz
Convert raw rice to cooked volume.
Convertidor de conversión de pasta
Convert dry pasta to cooked weight.
Convertidor de conversión de hierbas
Convert fresh herbs to dried.
Convertidor de conversión de ajo
Convert garlic cloves to teaspoons.
Convertidor de levadura
Convert between yeast types.
Calculadora de café
Ground coffee for multiple servings.
Calculadora de proporción de café
Coffee-to-water brew ratio.
Calculadora de café a agua
Find water for a coffee dose.
Calculadora de cold brew
Coffee and water for cold brew.
Calculadora de infusión de té
Tea leaves for water volume.
Calculadora de cafeína del café
Estimate caffeine from coffee dose.
Calculadora de huella del café
Estimate environmental impact of coffee.
Calculadora de alcohol por volumen
Calculate ABV from gravities or proof.
Calculadora de dilución de alcohol
Dilute spirits to a target ABV.
Calculadora de bebidas frías
Estimate dilution from melting ice.
Calculadora de proporción de cóctel
Split a cocktail into ingredient parts.
Calculadora de SO2 del vino
Potassium metabisulfite addition for wine.
Calculadora de azúcar de carbonatación
Homebrew bottle carbonation sugar.
Calculadora de porcentaje de panadero
Express ingredients as % of flour.
Calculadora de precio de pastel
Price a custom cake order.
Calculadora de porciones de pastel
Servings from cake dimensions.
Calculadora de receta de pancakes
Scale pancake batter ingredients.
Calculadora de helado
Base mix for homemade ice cream.
Calculadora de donuts
Donuts from batch dough weight.
Calculadora de chocolate
Chocolate needed for a recipe.
Calculadora de harina con levadura
Make self-rising flour at home.
Calculadora de masa madre
Hydration and starter feeding.
Calculadora de pizza
Pizza dough ingredient amounts.
Calculadora de pizza para fiesta
Pizzas needed for a crowd.
Calculadora de tamaño de pizza
Area of a pizza by diameter.
Calculadora de comparación de pizzas
Compare two pizza sizes.
Calculadora de tamaño de parrilla
Grill cooking surface area.
Calculadora de barbacoa para fiesta
Meat needed for a BBQ.
Calculadora de bebidas de fiesta
Drinks needed for an event.
Calculadora de palomitas
Kernels for desired popcorn volume.
Calculadora de barra de tacos
Plan a taco bar for a crowd.
Calculadora de alcohol de boda
Bottles needed for a wedding.
Calculadora de jamón por persona
Ham weight for a gathering.
Calculadora de arroz a agua
Water for a rice volume.
Calculadora de huevos hervidos
Boiling time for eggs.
Calculadora de tiempo ideal de huevo
Adjust egg time for altitude.
Calculadora de tiempo de steak
Pan or grill time by thickness.
Calculadora de tiempo de pavo
Roasting time by turkey weight.
Calculadora de descongelar pavo
Safe thaw time for turkey.
Calculadora de tamaño de pavo
Turkey weight for guest count.
Calculadora de enfriamiento de agua
Mix hot and cold water.
Calculadora de calorías de ensalada
Estimate salad calorie total.
Calculadora de puré por persona
Potatoes for a crowd.
Calculadora de salmuera
Salt brine for wet curing.
Calculadora de curado de bacon
Dry cure salt and sugar for bacon.
Calculadora de untables para pan
Butter or spread for servings.
Calculadora de azufre
SO₂ additions for winemaking.
Calculadora de almacenamiento de comida
Estimated safe storage duration.
Calculadora de escalado de recetas
Scale any ingredient amount.
Calculadora de sustitución de ingredientes
Convert substitute amounts.
Calculadora de meal prep
Portions and batches for meal prep.