About CalcZero
Free calculators. They work, they're fast, and they don't waste your time.
What is CalcZero?
It's a website with calculators. Mortgage payments, BMI, loan interest, GPA, calorie tracking—basically any common calculation you might need.
Works on whatever device you're using right now. No app to download, no account to make.
Why make another calculator site?
Because the existing ones are annoying. Half of them barely work on mobile. The other half take 10 seconds to load because they're stuffed with ads and tracking scripts.
CalcZero loads fast, works properly, and doesn't try to collect your email address.
Free to use
Every calculator. No premium version.
Mobile works fine
Unlike most calculator sites that clearly never tested on a phone.
No signup
You landed here to calculate something, not make an account.
No tracking
We don't know what you calculate and we don't save it.
What calculators are here?
Finance calculators for loans and mortgages. Health stuff like BMI and calorie counting. Math tools. GPA calculators. More getting added regularly.
They're all straightforward—put your numbers in, get your answer back. No multi-page forms.
How's this maintained?
Calculators get checked for accuracy. When formulas need updating or something breaks, it gets fixed.
Privacy: we're not tracking what you calculate. No analytics on your inputs, no database of your numbers. You calculate something, you leave, we never knew you were here.
The design is kept simple on purpose. Fewer things to break, easier to use, loads faster. Works better for people on slow connections or using translation tools.
What's being added?
More calculators. Improvements to existing ones when we find better ways to do things or when formulas change.
If there's a calculator you need that isn't here, or you spot something that's wrong, send feedback. A lot of what gets built comes from people saying "hey, can you add X?"