Calculations & units
Calculate return on investment, payback periods and tire size differences, and compare investment outcomes. Calculate or convert units for battery capacity, data rates, temperature, humidity, sound, fluids and energy.
15 Tools
Calculations for work & everyday life
- ROI calculatorCalculate return on investment from profit and costs
- Break-even calculatorCalculate break-even sales volume and revenue from fixed costs for the period, selling price per unit and variable cost per unit. Compare the theoretical quantity with the whole units needed after rounding up, then copy the results or save them as text. This calculation assumes one product with a constant selling price and variable cost per unit.
- Payback period calculatorCalculate a simple payback period in months and years from the initial investment and monthly or yearly net cash inflow. View the whole months needed after rounding up, then copy the results or save them as text. Net cash inflow is assumed to remain constant and arrive evenly during each period; discounting, tax adjustments and changes in later cash inflows are excluded.
- Investment strategy backtestCompare past investment strategy results from a daily price CSV
- Tire size calculatorCompare tire diameter, circumference and calculated speed differences
- File transfer time calculatorEstimate transfer time from file size and connection speed
Large numbers, data & batteries
Temperature, humidity, sound, fluids & energy
- Humidity & dew point converterCalculate moisture content and dew point from temperature and humidity
- Sound pressure level calculatorCalculate sound pressure, dB SPL and changes with distance
- Viscosity converterConvert dynamic and kinematic viscosity to other units
- Flow rate converterConvert flow rates per unit of time to other units
- Energy converterConvert energy units such as J, kWh and cal
- Earthquake magnitude converterCompare earthquake magnitudes and approximate energy