Simple tools. Instant answers.

Percentage Calculator

Calculate percentages three ways: find a percentage of a number, find what percent one number is of another, or find the total when you know a part and a percentage.

Days Between Dates

Count how many calendar days separate two dates, including the week-and-remainder breakdown.

Age Calculator

Calculate age in years, months and days from a birth date to today or to any target date.

CM to Inches

Convert centimeters to inches instantly using the exact 2.54 cm/inch definition.

KG to LBS

Convert kilograms to pounds using the exact international avoirdupois pound of 0.45359237 kg.

C to F

Convert Celsius to Fahrenheit with the exact formula F = C × 9/5 + 32.

KM to Miles

Convert kilometres to international miles using the exact 1 609.344 metre mile.

Fuel Cost

Estimate litres used, trip fuel cost and cost per kilometre from distance, L/100 km and price per litre.

EV Charging Cost

Estimate battery energy added, grid energy and charging cost from capacity, start/target %, price and efficiency.

Word Counter

Count words, characters, sentences and paragraphs in your browser. Text never leaves this page.