About Tellime
Tellime is a free online utility platform that gives you fast, no-friction answers to everyday questions — how many words you just wrote, what 38°C is in Fahrenheit, when a date falls on the calendar, what your monthly loan payment will be, what to name your next playlist. Every tool on Tellime works in your browser within seconds, with no signup, no paywall, and no preamble before the result.
Why Tellime exists
Most utility websites are surprisingly bad. The average online calculator hides the answer beneath a wall of advertising, demands an email address before showing a result, or buries the inputs you actually need under three pages of explanatory copy you didn't ask for. Tellime exists because a calculator should be a calculator.
We started Tellime to build the tools we wished already existed: instant, accurate, mobile-friendly, and free. The page loads, the input field is in front of you, you get your answer, and you go on with your day. No funnel, no upsell, no tracking pixel that follows you around the web for the next month.
What we offer
Tellime currently covers six broad categories of everyday tools:
- Calculators —percentage, age, loan, mortgage, tip, and finance utilities for quick decisions.
- Time & Date —date differences, time-zone conversions, countdown timers, and add/subtract-time tools.
- Converters —units of length, weight, temperature, currency, and digital storage.
- Text Tools —word and character counters, case converters, whitespace cleaners, word scramblers, and an anagram unscrambler.
- Randomizers —random number generators, coin flips, dice rollers, yes/no pickers, and name wheels.
- Creator Tools —hashtag generators, hook ideas, title brainstormers, and other utilities for social media and content work.
We add new tools regularly based on what people ask for.
How we build
Tellime is built by a small team based in Ohio. We design each tool to do one thing well rather than ten things adequately. Before a calculator goes live, we hand-check the math against multiple reference sources — and where a tool depends on third-party data (such as currency exchange rates), we surface the source and the freshness of that data so you can verify it yourself. We deliberately keep the interface lean: clear inputs, a visible result, an explanation when one is genuinely useful, and nothing extra.
Our values
Accuracy first. Every calculator is reviewed against authoritative sources before it ships, and we fix errors as soon as they're reported.
Speed. Pages are pre-rendered, assets are aggressively cached, and most tools run entirely in your browser so a result appears the moment you stop typing.
No signup required. Every public tool works without an account or email address.
Privacy-respecting. Most tools never send your input to a server. The full picture is in our Privacy Policy.
Free to use. All tools are free today, and we have no plans to put them behind a paywall.
Get in touch
Have a tool you'd love us to build, an inaccuracy to report, or a partnership to discuss? We'd love to hear from you — head over to our contact page.