No. 001 — Free Calculators
Every number you Google, kept in one ledger.
Fast, ad-light finance tools that give you the answer first. No accounts, no email walls, no fifteen paragraphs before the calculator. Type your numbers, get your total.
Finance — 001 to 007
001
Mortgage Calculator
Monthly payment, total interest, full schedule
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002
Loan Calculator
Personal, auto, or business loan payments
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003
Compound Interest Calculator
See how contributions grow over time
open →
004
Paycheck Calculator
Estimate take-home pay after tax and FICA
open →
005
ROI Calculator
Total return and annualized CAGR
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006
Credit Card Payoff Calculator
Months to debt-free and total interest
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007
Savings Goal Calculator
Monthly contribution needed to hit a goal
open →
About this ledger
Ledger Tools is a small, growing set of finance calculators built to answer one specific search at a time — "mortgage payment calculator," "compound interest calculator," and so on. Each tool is self-contained: the math runs in your browser, nothing you type is sent anywhere.
New tools are added in numbered order as they're built and checked, rather than published in bulk. The goal is a short list of tools that are actually correct and actually fast, not a long list of filler.