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Clear tools for percentages, finance, health, dates, conversions and everyday calculations.
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Percentage calculator
Calculate percentages, discounts, increases and changes between values instantly.
Use ->Rule of three calculator
Solve direct and inverse proportions with step-by-step work and verification.
Use ->GCD and LCM calculator
Calculate the greatest common divisor and least common multiple with steps and prime factors.
Use ->Quadratic equation calculator
Solve quadratic equations with the discriminant, real or complex roots, vertex and steps.
Use ->2x2 system of equations calculator
Solve a 2x2 linear system with determinants, Cramer's rule and verification.
Use ->Basic probability calculator
Calculate simple, union, intersection, complement and conditional probabilities.
Use ->Combinations and permutations calculator
Calculate combinations, arrangements and permutations with or without repetition and view the exact result.
Use ->Normal distribution and Z-score calculator
Calculate Z-scores, percentiles, probabilities and critical values for a normal distribution.
Use ->VAT, GST and sales tax calculator
Choose a country before estimating VAT, GST, GST/HST, sales tax or IVA with jurisdiction-specific coverage.
Use ->US sales tax calculator
Estimate California's statewide sales tax and optionally add a district rate looked up from CDTFA.
Use ->UK VAT calculator
Add or extract UK VAT at a classification you select from HMRC's published rates.
Use ->Canada GST/HST calculator
Estimate GST or HST after choosing the Canadian place of supply; excluded PST or QST is shown explicitly.
Use ->Australia GST calculator
Add or extract Australian GST for a simple domestic supply using the selected tax treatment.
Use ->New Zealand GST calculator
Add or extract New Zealand GST at 15% or a confirmed zero rate for a simple domestic supply.
Use ->Ireland VAT calculator
Add or extract Irish VAT after choosing a Revenue rate category.
Use ->Income tax calculators by country
Choose the country and rule period before estimating annual income tax.
Use ->Mexico income tax calculator
Estimate Mexican income tax by pay period or year, view the effective rate and compare withholding.
Use ->US federal income tax calculator
Estimate 2026 US federal income tax using the selected filing status and standard deduction; state and local tax are excluded.
Use ->UK income tax calculator
Estimate 2026–27 employment Income Tax after choosing Scotland or the rest-of-UK rate bands.
Use ->Canada income tax calculator
Estimate 2026 federal and Ontario base income tax; Ontario surtax and Health Premium are listed as excluded.
Use ->Australia income tax calculator
Estimate resident individual income tax for the 2026–27 Australian income year.
Use ->New Zealand income tax calculator
Estimate individual income tax for New Zealand's 2026–27 income year.
Use ->Ireland income tax calculator
Estimate 2026 PAYE Income Tax using a supported assessment profile and standard credits.
Use ->Mexico net salary calculator
Estimate net salary in Mexico after income tax, subsidies and entered deductions with a clear breakdown.
Use ->Take-home pay calculators by country
Choose the country and jurisdiction before projecting taxes, employee contributions and net pay.
Use ->US paycheck calculator
Project federal income tax and employee FICA; exact Form W-4 and state/local withholding are excluded.
Use ->UK take-home pay calculator
Project PAYE Income Tax and employee National Insurance category A for 2026–27.
Use ->Canada paycheck calculator
Project federal/Ontario base tax, CPP/CPP2 and EI for an Ontario employee.
Use ->Australia take-home pay calculator
Project resident income tax and the full-rate Medicare levy; PAYG schedule differences are disclosed.
Use ->New Zealand pay calculator
Project income tax and the ACC earners' levy; KiwiSaver and student loan remain optional exclusions.
Use ->Ireland take-home pay calculator
Project PAYE Income Tax, USC and employee PRSI Class A for the selected 2026 pay-date phase.
Use ->Mexico proportional vacation calculator
Estimate vested vacation days or proportional vacation for a final settlement under Mexico's Federal Labor Law.
Use ->US PTO accrual calculator
Track PTO under an entered employer policy without presenting it as a federal statutory vacation right.
Use ->Great Britain holiday entitlement calculator
Estimate statutory holiday for a regular working pattern in Great Britain, including supported leave-year proration.
Use ->Great Britain redundancy pay calculator
Estimate statutory redundancy pay for eligible Great Britain cases using age-weighted service and the 2026 weekly-pay cap.
Use ->Canada federal vacation pay calculator
Estimate annual vacation weeks and vacation pay only for federally regulated Canadian workplaces.
Use ->Canada federal termination pay calculator
Estimate federal individual notice or wages in lieu and severance after confirming Canada Labour Code coverage.
Use ->Australia NES annual leave calculator
Estimate four-week NES annual-leave accrual for covered non-casual employees using ordinary hours.
Use ->Australia NES redundancy pay calculator
Estimate NES redundancy weeks after checking system coverage, legal reason and common exemptions.
Use ->New Zealand holiday pay calculator
Estimate unused annual holiday pay after 12 months at the greater of ordinary weekly pay and average weekly earnings.
Use ->New Zealand final pay calculator
Estimate the supported 8% part-year holiday component and keep any contractual redundancy scenario separate.
Use ->Ireland annual leave calculator
Compare Ireland's three statutory annual-leave methods and return the greatest compatible entitlement.
Use ->Ireland redundancy pay calculator
Estimate statutory redundancy after confirming redundancy, insurable employment, age and continuous-service gates.
Use ->Mexico termination pay calculator
Estimate gross final pay, proportional benefits and conditional severance scenarios under Mexico's Federal Labor Law.
Use ->Compound interest calculator
Calculate compound growth with periodic contributions, inflation, and a year-by-year projection.
Use ->Inflation and purchasing power calculator
Estimate future prices and how much purchasing power money retains over time.
Use ->Simple interest calculator
Calculate simple interest and total value using daily, monthly, or annual rates.
Use ->Loan calculator
Estimate monthly loan payments, interest, total cost, and an amortization schedule.
Use ->Debt payoff calculator
Compare snowball and avalanche strategies, estimate interest, and build a monthly debt payoff plan.
Use ->Savings goal calculator
Calculate how much to save each month, when a goal can be reached, and how to adjust the plan.
Use ->ROI calculator
Calculate return on investment, profit, break-even amount, and progress toward a target ROI.
Use ->Margin and markup calculator
Calculate profit, margin, markup, break-even price, and a target selling price including fees.
Use ->Break-even calculator
Calculate the sales needed to cover costs, evaluate a projection, and reach a target profit.
Use ->Freelance hourly rate calculator
Calculate a sustainable freelance rate from income goals, expenses, taxes, fees, and billable hours.
Use ->Freelance project pricing calculator
Price a freelance project, compare scenarios, and check whether a fixed quote covers hours, expenses, risk, and margin.
Use ->DCA average cost calculator
Calculate average purchase price, effective cost including fees, and the impact of a future purchase.
Use ->Mortgage calculator
Estimate monthly mortgage payments, total interest and a month-by-month amortization schedule.
Use ->Home affordability calculator
Estimate an affordable home price from income, debts, available cash, mortgage rate and term.
Use ->Rent vs. buy calculator
Compare renting and investing with buying using a mortgage, upfront costs, appreciation and editable assumptions.
Use ->Cap rate calculator
Calculate cap rate, NOI, gross yield, cash flow and cash-on-cash return for a rental property.
Use ->Closing costs calculator
Estimate editable buyer and seller closing costs, cash required and seller proceeds.
Use ->Property appreciation calculator
Project a property's future value with compound appreciation and conservative, base and optimistic scenarios.
Use ->Price per area calculator
Calculate base and effective price per area and compare properties with different measurements and costs.
Use ->BMI calculator
Calculate body mass index and view the estimated healthy weight range for your height.
Use ->Body fat percentage calculator
Estimate body fat percentage from circumference measurements and review measurement sensitivity.
Use ->TDEE calculator
Estimate basal metabolic rate, total daily energy expenditure, and calorie targets by goal.
Use ->Exercise calories burned calculator
Estimate total and active calories burned from weight, duration, activity, and intensity.
Use ->Macro calculator
Calculate daily protein, carbohydrate, and fat targets from calories, weight, and goal.
Use ->Daily protein calculator
Calculate a daily protein range based on weight, goal, and type of training.
Use ->Calorie deficit calculator
Estimate daily calories, calorie deficit, weekly weight-loss rate, and goal timeline.
Use ->Pregnancy due date calculator
Estimate due date, gestational age, delivery window, and confidence from LMP, ultrasound, IVF, or an official due date.
Use ->Ovulation calculator
Estimate the fertile window, probable ovulation, next period, and confidence level from cycle information.
Use ->Maximum heart rate calculator
Estimate maximum heart rate by age and view general ranges for moderate and vigorous activity.
Use ->Heart rate zones calculator
Calculate five training zones from maximum heart rate percentage or the Karvonen heart rate reserve method.
Use ->Daily water intake calculator
Estimate a practical hydration range from weight, exercise, sweat level, and heat exposure.
Use ->One-rep max calculator
Estimate your one-repetition maximum, compare Epley and Brzycki, and calculate practical training loads.
Use ->VO2 max calculator
Estimate VO2 max using the Cooper or Rockport test and compare results from the same method.
Use ->Running pace calculator
Calculate pace, time, or distance and view equivalent speeds and cumulative race splits.
Use ->Race time predictor
Predict race times and paces for other distances from a recent performance and assess prediction quality.
Use ->Age calculator
Calculate exact age in years, months and days, days lived and time until the next birthday.
Use ->Date difference calculator
Calculate days between dates, add or subtract time and count weekdays excluding weekends.
Use ->Deadline countdown calculator
Calculate time remaining until a deadline, follow a live countdown and add the event to your calendar.
Use ->Work hours calculator
Add shifts, subtract breaks and estimate regular hours, overtime and hourly pay.
Use ->Pomodoro timer
Plan Pomodoro focus blocks, short and long breaks, total duration and estimated end time.
Use ->Meeting cost calculator
Estimate meeting cost, person-hours, recurring cost and potential savings.
Use ->Reading time calculator
Estimate reading time from word count and reading speed without sending text to a server.
Use ->Temperature converter
Convert temperatures between Celsius, Fahrenheit, Kelvin and other scales.
Use ->Kilometers to miles converter
Convert kilometers to statute miles and miles to kilometers with formulas and common equivalents.
Use ->Liters to gallons converter
Convert liters to US and Imperial gallons, or either gallon type to liters.
Use ->Area converter
Convert square meters, square feet, hectares and acres, or calculate area from dimensions.
Use ->Volume converter
Convert metric, US and Imperial volume and capacity units.
Use ->Weight converter
Convert kilograms, pounds, grams, ounces and stone with formulas and common equivalents.
Use ->Clothing size converter
Compare International, US, EU, UK and MX clothing sizes and measurement ranges.
Use ->Number base converter
Convert exact integers between binary, octal, decimal, hexadecimal and bases 2 through 36.
Use ->HEX, RGB and HSL color converter
Convert colors, generate a CSS color scale and check WCAG contrast.
Use ->Password entropy calculator
Estimate entropy, search space, predictable patterns and approximate attack times locally.
Use ->Download time calculator
Estimate download time or required speed from file size, connection speed and efficiency.
Use ->Area and perimeter calculator
Calculate the area and perimeter of squares, rectangles, triangles, circles and regular polygons.
Use ->Pythagorean theorem calculator
Calculate a right triangle's hypotenuse or missing leg with formulas and step-by-step work.
Use ->Basic statistics calculator
Calculate mean, median, mode, range and frequencies for a list of numbers.
Use ->Grade average and GPA calculator
Calculate simple and weighted averages, approximate GPA and the grade needed for a target.
Use ->Minimum grade calculator
Calculate the grade needed on a pending assessment to pass or reach a target.
Use ->Weighted grade calculator
Calculate accumulated and projected grades from weighted assessments and a target.
Use ->Study hours calculator
Calculate daily study hours, sessions and a weekly plan before a deadline.
Use ->School attendance percentage calculator
Calculate attendance percentage, available absences and classes needed to meet a minimum.
Use ->Cooking measurement converter
Convert cups, tablespoons, milliliters, grams and other common cooking measurements.
Use ->Oven temperature converter
Convert oven temperatures between Celsius, Fahrenheit and gas mark, with fan-oven guidance.
Use ->Cooking time by weight calculator
Estimate cooking time by kilogram or pound, including check, finish and serving times.
Use ->Recipe scaler
Adjust ingredient quantities for the original and desired number of servings.
Use ->Pet age calculator
Estimate a dog's or cat's equivalent age in human years using a veterinary reference table.
Use ->Pet calorie calculator
Estimate a daily calorie range for adult dogs and cats based on weight, profile and body condition.
Use ->Wedding budget calculator
Organize wedding expenses, deposits and contingency, then estimate the total and cost per guest.
Use ->Event cost per person calculator
Calculate total event cost, cost per guest, a suggested contribution or how many guests fit the budget.
Use ->Restaurant bill splitting calculator
Split a bill, add an optional tip and distribute exact or rounded payments.
Use ->Tip calculator
Calculate a tip, final total, rounded total and payment per person.
Use ->Fuel consumption calculator
Calculate fuel economy in km/L, L/100 km and US mpg or estimate fuel for a trip.
Use ->Vehicle depreciation calculator
Estimate depreciation, future value, accumulated loss and equivalent annual rate.
Use ->Annual vehicle cost calculator
Estimate annual, monthly and per-kilometer vehicle expenses with an editable reserve.
Use ->Cost per kilometer calculator
Estimate fuel, total trip cost, cost per kilometer and cost per passenger.
Use ->Concrete volume calculator
Calculate concrete volume by section, waste allowance, estimated bags and optional cost.
Use ->Brick calculator
Estimate bricks or blocks from wall area, openings, joints, waste allowance, packages and optional cost.
Use ->Floor and wall tile calculator
Calculate tile boxes from area, tile size, waste allowance, surplus and optional cost.
Use ->Renovation budget calculator
Organize line items, contingency and taxes, calculate cost per m² and compare the total with your budget.
Use ->Paint calculator
Calculate wall or ceiling area and estimate paint from coats and coverage.
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