Modules
Every tool module, explained
DailyTools is organized into 18 focused modules — 343 free calculators and utilities that run privately in your browser. Explore each module below, read what it covers, and jump straight to the tools you need.
Health & Fitness
21 tools · Understand your body, one number at a time.
Health & Fitness Calculators
Track body composition, daily calories, macros, pregnancy milestones, and cardio training zones with free browser-based health calculators. Every result includes the formula used, WHO or clinical references where applicable, and links to related tools like BMI, body fat, and TDEE — so you can understand the number, not just see it.
- BMI CalculatorBody Mass Index from height and weight.
- Body Fat CalculatorEstimate body fat with the U.S. Navy method.
- Lean Body Mass CalculatorFat-free mass from height and weight.
- FFMI CalculatorFat-free mass index for athletes.
- Ideal Weight CalculatorReference weight ranges by height.
- BMR CalculatorBasal metabolic rate at rest.
Finance
16 tools · Money math made plain.
Personal Finance & Loan Calculators
Model mortgages, personal loans, compound interest, retirement savings, and debt payoff scenarios before you commit. Our finance tools show monthly payments, total interest, and amortization schedules with inputs you control — ideal for comparing offers, planning a budget, or stress-testing a major purchase.
- Mortgage CalculatorMonthly payment and total interest.
- Loan CalculatorPersonal loan payment estimate.
- Auto Loan CalculatorCar payment estimate.
- Payment CalculatorPayment from principal, rate and term.
- Amortization CalculatorFull loan amortization schedule.
- Compound Interest CalculatorGrowth with compounding.
Islamic Finance
9 tools · Zakat, riba-free math.
Islamic Finance & Zakat Calculators
Calculate Zakat on cash, gold, silver, business assets, and investments with dedicated tools for each asset class. Enter your own Nisab thresholds and market prices, see the 2.5% estimate, and cross-check with our general Zakat calculator — all processed privately in your browser with no account required.
- General Zakat CalculatorZakat on combined assets.
- Cash Zakat CalculatorZakat on cash holdings.
- Gold Zakat CalculatorZakat on gold you enter by weight.
- Silver Zakat CalculatorZakat on silver you enter by weight.
- Business Zakat CalculatorZakat on business assets.
- Investment Zakat CalculatorZakat on investments.
PDF Tools
10 tools · Work with PDFs privately.
PDF Tools — Merge, Split, Sign & Convert
Merge multiple PDFs, split pages, add a signature, convert Word or RTF to PDF, and export pages as images — entirely in your browser. No cloud upload, no account, no file retention. Ideal for one-off document tasks where privacy matters as much as speed.
- PDF ToolsMerge, split, sign and convert PDFs.
- PDF MergerCombine PDF files into one document.
- PDF SplitterSplit a PDF into individual page files.
- PDF SignerAdd a styled name or signature image to a PDF.
- PDF to Image ConverterConvert each PDF page to a PNG image.
- Image to PDF ConverterTurn multiple images into one PDF.
Developer Tools
29 tools · Text and data utilities.
Developer & Data Tools
Format and validate JSON, encode Base64 and URLs, inspect JWTs, generate hashes, and compare text diffs — all without uploading sensitive config or API keys. A practical toolkit for developers who want fast utilities that respect privacy and work offline in the browser.
Image Tools
2 tools · Edit images privately.
Image Tools — Compress, Resize & Edit
Compress images for the web, resize to exact dimensions, and strip metadata before sharing. Every edit happens on your device, which makes these tools suitable for web publishing and social-media preparation without sending files to a server.
Animal Care & Farm
18 tools · Care and plan with confidence.
Animal Care & Farm Calculators
Estimate animal gestation dates and ages, track measured dog and cat weights, estimate horse and cattle weight from body measurements, and plan livestock records with browser-based tools that make their assumptions clear. Each calculator is designed for planning and record keeping, not diagnosis, treatment, or veterinary dosing.
- Cat Pregnancy CalculatorEstimated feline due date.
- Cow Gestation CalculatorEstimated calving date.
- Dog Pregnancy CalculatorEstimated canine due date.
- Goat Gestation CalculatorEstimated kidding date.
- Guinea Pig Pregnancy CalculatorEstimated guinea pig due date.
- Mare Gestation CalculatorEstimated foaling date.
Home & Construction
18 tools · Plan the build.
Home & Construction Calculators
Estimate concrete volume, paint coverage, tile quantities, flooring, and landscaping materials before you buy. These calculators help DIY renovators and contractors ballpark material needs from room dimensions — reducing waste and surprise trips to the hardware store.
Math
7 tools · Everyday math, unstuck.
Everyday Math Calculators
Solve percentages, fractions, ratios, averages, and geometry problems in seconds. Whether you are checking a bill, scaling a recipe, or working through homework, each calculator shows clear steps and supports the kind of quick arithmetic people search for dozens of times a day.
Date & Time
7 tools · Time, decoded.
Date, Age & Time Calculators
Find exact age in years and days, count business days between dates, convert time zones, and decode Unix timestamps. These tools answer the date-and-time questions that come up in contracts, project planning, developer workflows, and everyday life — without opening a spreadsheet.
Education
5 tools · Grades and GPAs, sorted.
GPA & Education Calculators
Calculate weighted and unweighted GPA, plan the final-exam score you need, and track attendance rates. Built for students, teachers, and parents who want transparent grade math with no sign-up — paste your numbers, get the result, and move on.
Unit Converters
12 tools · Any unit, instantly.
Unit Converters
Convert length, weight, temperature, volume, area, speed, and more between metric and imperial systems instantly. Includes a manual currency converter for travel and side projects. Every conversion runs locally — useful when you need a quick answer without trusting a random converter site with your data.
Chemistry
29 tools · Stoichiometry, solutions, and gas laws.
Chemistry Calculators
Convert between moles and grams, calculate molarity and dilutions, apply gas laws, and work through thermochemistry problems with clear formulas. Built for high-school and introductory college chemistry — every calculation runs privately in your browser with step-by-step context.
- Mole CalculatorConvert between moles, particles, and mass.
- Molar Mass CalculatorFind molar mass from a chemical formula.
- Molecular Weight CalculatorCompute molecular weight of any compound.
- Grams to Moles CalculatorConvert a mass in grams to moles.
- Moles to Grams CalculatorConvert moles to mass in grams.
- Mass Percent CalculatorFind mass percent composition of a compound.
Physics
35 tools · Motion, force, energy, and waves.
Physics Calculators
Solve kinematics, force, energy, electricity, wave, optics, and fluid mechanics problems with SI-friendly inputs and instant results. From F = ma and Ohm's law to projectile motion and buoyancy — useful for homework checks and quick lab estimates.
- Velocity CalculatorFind velocity from displacement and time.
- Speed CalculatorFind speed from distance and time.
- Average Speed CalculatorMean speed over multiple segments.
- Acceleration CalculatorRate of change of velocity over time.
- Distance CalculatorDistance from speed and time or SUVAT.
- Time CalculatorTime from distance and speed or acceleration.
Statistics
29 tools · Data, probability, and inference.
Statistics Calculators
Compute mean, median, standard deviation, probability distributions, regression, and hypothesis-test statistics from your data. Paste a data set or enter summary values — ideal for coursework, surveys, and quick data exploration without uploading spreadsheets.
- Mean CalculatorArithmetic average of a data set.
- Median CalculatorMiddle value of sorted data.
- Mode CalculatorMost frequently occurring value.
- Range CalculatorSpread from minimum to maximum.
- Variance CalculatorAverage squared deviation from the mean.
- Standard Deviation CalculatorTypical distance from the mean.
Food & Cooking
68 tools · Recipes, conversions, and party planning.
Food & Cooking Calculators
Convert cups to grams, scale recipes, plan coffee ratios, estimate turkey cook times, and price party food — kitchen math with realistic constants and step-by-step explanations. Every calculator runs in your browser with no account.
- Butter CalculatorConvert butter between cups, grams, and sticks.
- Butter Stick ConverterConvert butter sticks to grams or cups.
- Cake Pan ConverterScale a recipe between pan sizes.
- Cooking Measurement ConverterConvert cups, tablespoons, and teaspoons.
- Cups to Pounds ConverterConvert cups of an ingredient to pounds.
- Pounds to Cups ConverterConvert pounds of an ingredient to cups.
Earth & Weather
20 tools · Coordinates, climate, and sky.
Earth & Weather Calculators
Calculate great-circle distance, antipodes, wind chill, heat index, dew point, UV exposure, and growing degree days from inputs you control. Useful for navigation, gardening, outdoor safety, and weather literacy.
- Antipode CalculatorFind the point on Earth directly opposite any location.
- Latitude Longitude Distance CalculatorGreat-circle distance between two coordinate pairs.
- Azimuth CalculatorInitial bearing between two coordinates.
- Great Circle Distance CalculatorShortest path distance over a sphere.
- Sunrise Sunset CalculatorApproximate sun times for a location and day.
- Moon Phase CalculatorMoon phase and illumination for a date.