Calculators & Converters
Online calculators and converters for percentages, loans, units, temperature, speed, discounts, compound interest and more.
Percentage Calculator
Calculate a percentage of a number, percentage relationships and percentage increase or decrease.
★Loan Calculator
Estimate periodic payments, total interest and total repayment from loan amount, rate and term.
★BMI Calculator
Calculate BMI from height and weight and show common range categories; results are for general informational use only.
Tip Calculator
Calculate tip and total from a bill amount and tip rate, with quick support for splitting a bill.
Universal Unit Converter
Convert values across multiple common unit categories by selecting the source and target units.
Length Converter
Convert length between millimeters, centimeters, meters, kilometers, inches, feet, yards, miles and more.
Weight Converter
Convert weight and mass between grams, kilograms, tonnes, ounces, pounds, stones and other common units.
Temperature Converter
Convert temperatures instantly between Celsius, Fahrenheit and Kelvin.
Data Size Converter
Convert data sizes between bytes, KB, MB, GB, TB and other common storage units.
Speed Converter
Convert speed between km/h, m/s, mph, knots and other common units.
Area Converter
Convert area between square meters, square kilometers, square feet, acres, hectares and other common units.
Fuel Economy Converter
Convert fuel economy between L/100 km, km/L, MPG and other common formats for vehicle comparisons.
Discount Calculator
Enter an original price and discount rate to calculate the sale price and amount saved.
Compound Interest Calculator
Calculate future value, total interest and growth from principal, interest rate, term and compounding frequency.
Aspect Ratio Calculator
Calculate matching width, height or ratio values for images, video, screens and web layouts.
GPA Calculator
Calculate a weighted GPA from course grades and credits to summarize semester or course performance.
VAT / GST Calculator
Calculate VAT or GST amount and tax-inclusive or pre-tax totals for quotes, purchases and invoice checks.
Profit Margin Calculator
Calculate profit, profit margin and markup from cost and selling price for pricing and basic business checks.
Running Pace Calculator
Calculate running pace, speed or estimated finish time from distance and elapsed time.
About these tools
Online calculators and converters for percentages, loans, units, temperature, speed, discounts, compound interest and more.