About TinyTools

TinyTools is a small, focused collection of calculators for one topic: turning work hours into pay. Time cards, hours worked, overtime, salary and hourly conversions, and take-home pay estimates for the United States, Canada, the United Kingdom, and Australia.

Who builds TinyTools

Muhammad Wajih Ul Hassan — Lead Developer & Software Engineer. Senior Software Engineer and Application Developer specializing in workplace tools, financial calculators, and utility apps. Founder of HasTech. (HasTech: hastech.online)

He is responsible for every calculator and guide here. He is a software engineer, not a payroll, tax, or legal professional: the tools apply published rules and rates, each one is cited to the statute or agency publication it comes from, and the results are estimates. For your own situation, confirm with your employer's payroll team or a qualified adviser.

Why I built this

I'm a software engineer, and the calculations behind a paycheck are the kind of problem I like: simple on the surface, full of edge cases underneath. Working out "how many hours did I work this week" sounds trivial until the shift crosses midnight, the clocks change overnight, a lunch break is split in two, or someone writes 7 hours 45 minutes as 7.45 instead of 7.75 and loses pay without noticing.

The same goes for overtime. The rule people quote — time and a half after 40 hours — is only the US federal rule. California adds daily overtime and double time, Ontario starts at 44 hours, the UK has no legal overtime premium at all, and in Australia it depends on your award. Most free calculators pick one rule and quietly apply it to everyone.

So I built TinyTools the way I would build any production software:

• One tested engine. Every calculator runs on the same calculation library, which has its own automated test suite with worked examples; the paycheck engine is also spot-checked by hand against the published 2026 IRS and state tables.
• The rule is chosen, not assumed. Where the law differs by place, the calculator asks which rule applies and the guides explain each one, with links to the official source.
• Honest limits. If a state or country isn't supported, the tool says so instead of producing a number that looks right but isn't.

If a result doesn't match your payslip, or a rule here is out of date, please tell me — I'd rather fix it than have anyone rely on a wrong number.

What we're trying to do

Most "work hours" and "pay" searches are answered by pages that bury a thin calculator under a wall of text, or by generic tools that ignore the messy parts — overnight shifts, multiple breaks, an overtime threshold that isn't 40 hours where you live. We build each calculator as a proper tool first: clear inputs, sensible defaults, a visible formula, and a result you can copy, print, or share.

How the calculators work

• Everything runs in your browser. There is no server doing the maths and nothing you enter is sent anywhere. The tools keep working offline once the page has loaded.
• One shared calculation engine. All the tools use the same tested TypeScript library, so a time card and the overtime calculator agree with each other. Money is handled in whole cents to avoid rounding drift.
• Sources are cited. Every overtime threshold and 2026 tax figure references the relevant statute or agency publication on the Methodology & Sources page. Where a rule is simplified or a jurisdiction isn't supported, the page says so rather than guessing.

Accuracy and limits

Results are estimates, not official figures or advice. Paycheck estimates currently cover US tax year 2026 and a limited set of states. See the Disclaimer for exactly what is and isn't modelled, and get in touch if you spot something wrong — corrections are welcome.

How the site is funded

TinyTools is free and supported by advertising. Ads are clearly labelled and kept away from the calculator controls and results so they can't be mistaken for part of a tool. See our Privacy Policy for how analytics and advertising cookies are handled.