Finance calculators for life's biggest decisions
Know your numbers before you sign.
High-precision financial modeling for the detail-oriented. Calculate mortgages, FIRE timelines, and compound growth — entirely in your browser.
Inputs update results instantly — no submit button.
Every calculation can be captured in a link.
Inputs never leave your browser.
Calculators
Calculate monthly PITI payments and amortization schedules.
Visualize long-term wealth growth with monthly contributions.
Compare monthly payments across auto and personal loan terms.
Project your path to financial independence and early retirement.
Plan how much to save each month to hit any target amount.
Model retirement savings with employer match and Social Security.
Compare Avalanche vs Snowball repayment strategies.
Compare true long-term cost of renting vs buying a home.
Utilities
Calculate date differences, add durations, count business days.
Convert between Unix timestamps and human-readable dates.
Convert between meters, feet, miles, and other length units.
Convert between kilograms, pounds, ounces, and more.
Convert between liters, gallons, cubic meters, and more.
Convert between square meters, acres, hectares, and more.
Convert between m/s, km/h, mph, and other speed units.
Chart Makers
Create and export line graphs from CSV or manual data.
Create and export bar graphs from CSV or manual data.
Create pie charts with custom colors and labels.
Create doughnut charts with custom colors and labels.
Plot X/Y data as a scatter chart and export PNG.