About HourCalc

HourCalc is a collection of free, fast and private calculators for everything to do with time at work and in daily life: hours worked, weekly and biweekly time cards, overtime, converting minutes to decimal hours, military time, time zones, dates and more.

Why we built it

Time maths looks simple but is easy to get wrong – clocks count in 60s, shifts cross midnight, payroll needs decimals and overtime rules vary. Many existing calculators are slow, cluttered or ask you to sign up. HourCalc aims to give the correct answer in a second, on any phone or computer, with clear explanations of how each result is worked out.

How our tools work

• Private by design: every calculation runs in your browser with JavaScript. Times, rates and dates you enter are never sent to our servers.
• Transparent formulas: each page explains the formula and shows worked examples so you can check the result yourself.
• Free: the site is supported by advertising, so the tools stay free for everyone.

Accuracy

We test each calculator carefully, but results are provided for general information only. Labor laws, overtime rules and payroll practices differ by country, state and employer – always confirm important figures with your employer, payroll provider or local labor authority. Found a mistake or have an idea for a new tool? Contact us.