Free Financial Calculators
Choose a calculator below to get started. Each tool opens its own dedicated page with a full explanation of the math.
Find out what a dollar amount from any year between 1913 and 2026 is worth in today's money using official BLS CPI-U data, current through April 2026.
Find out what a pound sterling amount from any year between 1988 and 2026 is worth in today's money using official ONS CPI data (series D7BT, 2015=100).
See what a historical stock investment in Apple, Microsoft, S&P 500, and more would be worth today — compared to holding cash.
Calculate your monthly payment, total interest paid, and view a full year-by-year amortization schedule for any loan.
Get your full monthly housing cost: principal, interest, property tax, home insurance, and PMI if applicable.
See how your money grows with compounding, including monthly contributions and a year-by-year growth table.
Find out what a historical salary is worth in today's dollars and how much you'd need to earn now to maintain the same purchasing power.
Estimate your federal income tax, effective rate, marginal rate, and take-home pay for 2024, 2025, or 2026 tax years.
Calculate how long it takes to pay off debt, how much interest you'll pay, and how much you'd save by paying more each month.
Project your 401(k) balance at retirement with employer match, 2026 IRS contribution limits, compound growth, and inflation adjustment.
Estimate your nest egg at retirement and the monthly income it can support using the 4% rule and annuity drawdown, with inflation-adjusted figures.
Calculate your monthly car payment, total interest, and full amortization schedule. Includes down payment, trade-in value, and sales tax.
What is QuickCalculator?
QuickCalculator is a collection of free financial calculators designed for people who want clear, honest answers to everyday money questions — without the upsell, the paywall, or the data collection.
Each calculator on this site is built around a single goal: give you an accurate, understandable result with enough context to actually learn something. That means showing you the formula, walking through a worked example, and explaining what the numbers mean in plain English.
All calculations happen entirely in your browser. No data you enter is transmitted anywhere. No account is required. We use official sources — the US Bureau of Labor Statistics for inflation data, and official IRS revenue procedures for tax brackets — and we tell you exactly where the numbers come from.
These tools are designed for educational purposes. They are not a substitute for professional financial advice. For significant financial decisions, please consult a qualified advisor.
Learn More: Financial Concepts Explained
Plain-English articles that explain the concepts behind the calculators.
A practical explanation of inflation, how the CPI is measured, and what rising prices mean for your purchasing power.
InvestingThe difference between simple and compound interest — and why Einstein may have called compounding the eighth wonder of the world.
TaxesMost people misunderstand how tax brackets work. Here's the clear explanation with numbers.
MortgagesWhy so much of your early mortgage payment goes to interest — and what to do about it.
DebtTwo popular debt payoff strategies compared — with the math on which saves more money.
InvestingA quick mental math trick for estimating how long it takes money to double at a given interest rate.