Age Calculator
Calculate age in years, months, and days from a date of birth to today or another date.
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Find a calculator by category, keyword, or common use case.
Discount Calculator
Find discount amount, final sale price, original price before discount, and percentage off.
Open calculator →Markup Calculator
Calculate selling price, markup amount, or markup percentage from cost and price.
Open calculator →Percent Off Calculator
Calculate how much money you save and the final price after a percent-off discount.
Open calculator →Percentage Calculator
Calculate percentages, percentage increase or decrease, and what percent one number is of another.
Open calculator →Profit Margin Calculator
Calculate profit margin, profit amount, cost, revenue, and target selling price.
Open calculator →Sale Price Calculator
Calculate the final sale price after a percentage discount or fixed money discount.
Open calculator →Time Duration Calculator
Calculate the duration between two dates and times in days, hours, minutes, and seconds.
Open calculator →Unit Price Calculator
Compare prices by calculating cost per item, kilogram, litre, metre, or any unit quantity.
Open calculator →VAT Calculator
Add VAT to a price, remove VAT from a VAT-inclusive price, and show the VAT amount.
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Financial Calculators
Free money calculators for VAT, discounts, loans, savings, salary, interest, and everyday financial decisions.
Math Calculators
Simple online math calculators for percentages, fractions, averages, ratios, formulas, and school or daily math problems.
Time & Date Calculators
Calculate age, date differences, hours, time duration, days between dates, and other time-based questions.
Business Calculators
Pricing and small-business calculators for markup, profit margin, sale price, unit price, and everyday trading decisions.
Construction Calculators
Practical construction calculators for concrete, square footage, roofing, tiles, gravel, stairs, and material estimates.
Conversion Calculators
Conversion tools for units, length, weight, mass, speed, density, encoding, and daily measurement conversions.
Health & Fitness Calculators
Health and fitness calculators for BMI, calories, BMR, ideal weight, pregnancy dates, pace, and nutrition estimates.
Education Calculators
School and study calculators for grades, GPA, weighted scores, final exam targets, and percentage grades.
Other Calculators
Useful everyday tools such as password generators, tip calculators, fuel cost calculators, dice rollers, and more.