Productivity & Field Math
Calculate ROI, hourly-to-salary conversions, and sales commissions. Practical financial and productivity calculators for professionals working in the field.
ROI Calculator
Calculate Return on Investment (ROI) to measure the profitability of an investment relative to its cost. Key metric for financial decision making.
Hourly to Salary
Convert an hourly wage into an equivalent annual salary based on a standard work year. Helpful for job comparisons and income planning.
Salary to Hourly
Break down an annual salary into an hourly rate. Useful for freelancers and employees evaluating compensation packages.
Simple Interest
Calculate simple interest on a loan or investment over time. Useful for quick financial estimates without compounding complexity.
Rule of 72
Estimate the number of years required to double an investment at a fixed interest rate. A classic mental math shortcut for investors.
Commission Calc
Calculate sales commission payouts based on total sales amount and commission percentage. Essential for sales professionals tracking earnings.