Cute, fast calculators for everyday math
Every tool below runs entirely in your browser. Nothing you type is ever uploaded or stored anywhere — just plug in numbers and go. Can't find one? Press / to search.
⭐ Most popular
The tools people reach for most.
Percentage Calculator
Find X% of Y, or what percent X is of Y.
⚖️BMI Calculator
Calculate body mass index from height and weight.
🏦Loan / EMI Calculator
Calculate monthly payment from loan amount, rate, and term.
🎂Age Calculator
Get exact age in years, months, and days from a birthdate.
⚖️Kg to Lbs Converter
Convert kilograms to pounds, both directions.
🌡️Celsius to Fahrenheit Converter
Convert Celsius to Fahrenheit, both directions.
🎓GPA Calculator
Calculate GPA from grades and credit hours.
💵Tip Calculator
Calculate tip amount and split a bill between people.
Money & Finance
Loans, interest, tax and everyday money math.
Percentage Calculator
Find X% of Y, or what percent X is of Y.
🏦Loan / EMI Calculator
Calculate monthly payment from loan amount, rate, and term.
🏠Mortgage Calculator
Estimate your monthly mortgage payment, taxes and insurance.
📈Compound Interest Calculator
Project investment growth with compound interest.
➗Simple Interest Calculator
Calculate interest earned using the simple interest formula.
🏷️Discount Calculator
Find the final price and savings from a percentage discount.
🧾Sales Tax Calculator
Calculate tax amount and total price from a tax rate.
💵Tip Calculator
Calculate tip amount and split a bill between people.
🧮Split Bill Calculator
Split a total bill with tip between any number of people.
💼Salary Converter
Convert between annual, monthly, weekly and hourly pay.
🏖️Retirement Savings Calculator
Project your balance and income at a target retirement age.
💹ROI Calculator
Calculate return on investment, with annualized rate.
💰Investment Calculator
Project growth with monthly contributions and a return rate.
📐Profit Margin Calculator
Calculate profit margin and markup from cost and price.
🔺Markup Calculator
Find selling price from cost + target markup or margin.
🔖VAT Calculator
Add or remove VAT from a price, either direction.
🪙Take-Home Pay Calculator
Estimate net pay from gross salary and tax rate.
⏰Hourly-to-Salary Calculator
Convert hourly wage to salary, or salary to hourly.
🎈Inflation Calculator
See how inflation changes the value of money over time.
🐷Savings Goal Calculator
Find the monthly savings needed to hit a target.
🗂️Budget Calculator
Split monthly income with the 50/30/20 rule.
🔌Electricity Bill Calculator
Estimate an appliance's monthly running cost.
Everyday Life
Dates, units and conversions you look up all the time.
Age Calculator
Get exact age in years, months, and days from a birthdate.
📅Date Difference Calculator
Find days, weeks, or months between two dates.
⏱️Time Duration Calculator
Add or subtract hours and minutes.
🌍Time Zone Converter
Compare a time across two time zones.
📏Unit Converter
Browse all conversion categories in one place.
📐Height Converter
Convert height between centimeters and feet/inches.
⛽Fuel Cost Calculator
Estimate trip fuel cost from distance, mileage and fuel price.
📊Statistics Calculator
Get mean, median, mode, range and standard deviation from a list.
🔤Number to Words Converter
Convert a number into written-out words.
⚖️Kg to Lbs Converter
Convert kilograms to pounds, both directions.
⚖️Lbs to Kg Converter
Convert pounds to kilograms, both directions.
🌡️Celsius to Fahrenheit Converter
Convert Celsius to Fahrenheit, both directions.
🌡️Fahrenheit to Celsius Converter
Convert Fahrenheit to Celsius, both directions.
🛣️Miles to Km Converter
Convert miles to kilometers, both directions.
🛣️Km to Miles Converter
Convert kilometers to miles, both directions.
📏Feet to Meters Converter
Convert feet to meters, both directions.
📏Inches to Cm Converter
Convert inches to centimeters, both directions.
📏Cm to Inches Converter
Convert centimeters to inches, both directions.
🧴Liters to Gallons Converter
Convert liters to US gallons, both directions.
⚖️Ounces to Grams Converter
Convert ounces to grams, both directions.
🚗Mph to Km/h Converter
Convert mph to km/h, both directions.
📏Length Converter
Convert between meters, feet, miles, inches and more.
⚖️Weight Converter
Convert between kg, lbs, stone, ounces and more.
🗺️Area Converter
Convert between sq meters, sq feet, acres and hectares.
🧪Volume Converter
Convert between liters, gallons, cups, fl oz and more.
💾Data Storage Converter
Convert between bits, bytes, KB, MB, GB, TB and PB.
🚀Speed Converter
Convert between mph, km/h, m/s, knots and ft/s.
📆Business Days Calculator
Count weekdays between two dates.
🗓️Date Add/Subtract Calculator
Add or subtract time from a date.
📅Weeks & Months Between Dates
Break a date gap into full weeks or months.
Health
Body, nutrition and pregnancy math, kept simple.
BMI Calculator
Calculate body mass index from height and weight.
🤰Pregnancy Due Date Calculator
Estimate a due date from the last menstrual period.
🔥BMR Calculator
Estimate calories burned at complete rest.
🍽️Calorie Calculator
Estimate daily calories to maintain, lose or gain weight.
🎯Ideal Weight Calculator
Estimate a healthy weight range from height.
🥑Macro Calculator
Split daily calories into protein, carbs and fat.
📏Body Fat Calculator
Estimate body fat % from tape measurements.
💧Water Intake Calculator
Estimate daily water intake from weight and activity.
Math
Fractions, ratios, roots and probability without the textbook.
Fraction Calculator
Add, subtract, multiply or divide fractions.
⚖️Ratio Calculator
Simplify ratios or solve a proportion.
➕Average Calculator
Find the mean, median, or a weighted average.
√Square Root Calculator
Find the square root, cube root or any nth root.
⚡Exponent Calculator
Raise any base to any power.
🎲Probability Calculator
Calculate single or combined event probability.
School
Grades and GPA without the spreadsheet.
Sport
Pace and speed for training.