One toolkit for every number you need

Omni Calculator brings standard, scientific, programmer, conversion, age, health, currency, and date tools into one place, so you never switch between unrelated sites to finish a calculation.

Each calculator shows its formula and units so you can check the working. Scientific functions use standard floating-point arithmetic, and programmer tools operate on 64-bit integers with explicit bitwise logic. Unit conversions use exact published factors, and date math counts calendar days and working days by clear, documented rules.

Where a result depends on rounding or an estimate, such as BMR, TDEE, or live exchange rates, the tool labels it as an estimate and states its basis. We do not promise perfect accuracy for every input, and we correct formulas when verification shows an error.

Omni Calculator performs calculations locally in your browser. The numbers, dates, units, and health values you enter are processed on your device and are not transmitted to our servers for calculation. We do not sell personal information, and we do not use calculator inputs for advertising profiles.

In line with Google Play Store policies, we limit data collection to what the app needs to function, disclose any third-party services that handle data, and provide a way to contact us about privacy questions. Live currency rates are fetched from a provider when you request them; no personal calculation data is included in those requests. Questions about this policy can be sent through the contact page.