Our Best Calculators that show their work.
calcsdone started with a simple idea: We had put all the useful calculators anyone might actually need for finance, school, construction, fitness. All in one place with the formula visible and logic behind the results. Don`t worry as nothing sent to a server.
Browse all 100+ calculators →Why we built this website?
For Users easiness, as none of the calculator actually needs any sign up, no annoying advertisements.
A very easy to use collection of 100+ calculators, that gives you instant results totally free!
Read our FAQ →Zero data collection
No sign ups required, we don’t track your data you input. All of these calculators actually runs entirely in your browser.
Instant results
Give instant results in seconds as you type. No loading time or API to connect.
Verified formulas
We had source and methodology links at the end of every calculator. Every calculator formula is source from most authentic sites.
Always free
No paywalls, no usage caps, no premium tier.
The principles behind every calculator
We double check standard policies of every calculator before it goes live.
Clarity first
We had used very simple language to understand. No Jargon words that needs to be decoded.
Show the formula
Every results are shown based on formula behind it.
Privacy by default
We don`t track you data, everything is done on your browser.
Built from requests
Most of these calculator are built on request of users. If you want to suggest any calculator, that is not enlisted you can reach us via our contact us page.
Same three steps, every time
Source the formula
Sourced from a cited, industry-standard references. Results or not guess, they are calculated with standard formula.
Build and test it
We had checked every calculator with known examples before it ever goes live on the site. If you still found any bugs report to us.
Publish, then refine
you can suggest chnages in the fields once these are live, we will immediately make changes as per suggestions.
Have a calculator in mind?
Suggest any calculator in your mind, it will be available in 2 days.