Mortgage Calculator
Monthly payment, amortization, PMI, extra-payment savings, refinance break-even.
Open mortgage calculator →Compound Interest Calculator
Project growth with monthly contributions, variable rates, and inflation adjustments.
Open compound interest calculator →Percentage Calculator Soon
Tax, tip, markup, discount, percent change — every common percent problem in one place.
Tip Calculator Soon
Split bills, custom tip rates, and per-person totals with tax.
Salary Calculator Soon
Hourly ↔ annual conversion, take-home pay, overtime, and per-paycheck breakdown.
Why MoneyMathKit
- No signup, no ads slowing you down. Every calculator loads in under a second.
- Mobile-first. Inputs sized for thumbs, no zooming required.
- Math you can trust. Standard formulas, no rounding tricks, full breakdowns.
- Free forever. No subscriptions, no “pro” gates.