Every calculator here answers one real money question with real math — then gets out of your way. No account, no email gate, no upsell. Pick the question that's on your mind.
Convert any purchase into the number of coffees it equals — instant perspective on what you are about to spend.
Open calculator →See what a daily habit really costs per year, and what it could become if you invested it instead.
Open calculator →Run every girl math rule — cost per wear, return credit, cash discount — for an honest verdict on a purchase.
Open calculator →Turn any price into the hours of work it costs you, based on your real take-home hourly rate.
Open calculator →Estimate the true cost of a DIY project — materials plus your time — and compare it to hiring a pro.
Open calculator →Find your real cost per gym visit, including drive time, so you can decide keep it or cancel it.
Open calculator →See what a raise actually nets after federal tax, state tax, and FICA — your true monthly increase.
Open calculator →Divide rent and shared bills by income so each person pays the same percentage of what they earn.
Open calculator →Add up every recurring charge to reveal your real monthly and yearly total — forgotten ones included.
Open calculator →Discover how many days, loads, and dollars you will spend on laundry across a lifetime.
Open calculator →Add gas, wear, and the value of your time to see what your daily commute really costs each year.
Open calculator →Compare buying and leasing honestly — accounting for your remaining loan balance and real equity.
Open calculator →Get your exact debt-free date and total interest in three modes, so you can plan your way out.
Open calculator →I kept running into the same wall: I'd have an ordinary money question — what a raise really nets after taxes, when a credit card would actually be paid off — and every answer online was either buried under 2,000 words of filler, gated behind an email signup, or hedged into uselessness. So I built the thing I actually wanted: a set of calculators that give you a straight number and trust you to decide what to do with it.
None of these tools tell you to stop buying coffee. They're built on the idea that better information leads to better decisions — not shame. If you look at what a daily habit costs over thirty years and decide it's worth every cent, that's a completely valid conclusion. Now it's an informed one. That's the whole point.
Every calculator uses standard, publicly documented formulas — compound interest, amortization, marginal tax brackets, opportunity cost. Where a calculation needs an assumption, you can see it and change it. Read more about who built this and why, or just pick a calculator above and get your answer.