Research the Formulas
Before we build a calculator, we look up the standard formulas used in that area — loan amortization, fuel economy conversions, lease math, and so on. We cross-reference publicly available sources to make sure we're using the right approach.
Build & Review
We implement the calculator and then review each other's work. As developers (not financial advisors), we focus on making sure the math is correct, edge cases are handled, and the tool gives sensible results.
Test With Real Numbers
We plug in real-world numbers and compare our results against manual calculations and other well-known calculator sites. If something looks off, we dig in until it matches.
Keep Things Current
When tax rates change or new standards come out, we update the relevant calculators. We also fix issues reported by users — if you spot something wrong, let us know.