Financial calculators for the US, free and instant

Free to calculate — and a free account saves the answer and keeps it up to date once you connect your accounts. Every calculator here runs the same engine as Hunch’s in-app planning tools, with federal and state tax brackets and FICA built in.

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Home & mortgage

Buying, renting or financing a place to live — what the payment actually costs you each month, and whether the numbers work before you commit.

Debt

What a balance really costs, how long it takes to clear, and whether avalanche or snowball gets you there faster.

Saving & investing

Where your money goes now, what it grows into later, and how close you already are to the number you need.

Compound growth

Project how savings or investments grow over time.

Savings rate

Your savings rate and time to hit a target.

Savings interest calculator

See what a high-yield savings account really pays — the APY behind the quoted rate, interest over time, and the tax on it.

Net worth

Add up assets and liabilities for a full picture.

50/30/20 budget

Check needs, wants, and savings against the classic split.

FIRE number

Your financial independence number and Coast FIRE crossover.

Coast FIRE

The balance that reaches your FIRE number with nothing added.

Barista FIRE

The smaller portfolio you need when part-time work covers part of the bill.

Lean FIRE

A FIRE number built from a bare-bones budget, priced line by line.

Fat FIRE

A high-spending FIRE target, grossed up for the tax on withdrawals.

Emergency fund

How many months of essential spending to hold, and how long it takes to save.

Sinking fund

Save a known amount by a known date, across several goals at once.

HSA calculator

Income tax saved, the payroll tax a payroll-deducted contribution also escapes, and what the balance grows to if you invest it instead of spending it.

529 plan calculator

What the account is worth by enrollment, what the whole programme costs by then with each year inflated separately, and the monthly amount that closes the gap.

Household bill split calculator

Split the rent and the rest of the shared bills in proportion to what each person earns, and see the share of income it takes from each of you.

Subscription cost calculator

What a recurring charge totals over five, ten and twenty years once the price increases compound, and what the same payments would have been worth invested.

Inflation

What an amount will be worth later, and what today’s prices become — at a rate you set.

Raise vs inflation

Is your raise a raise? Your new salary in today’s dollars, and the one you needed to stand still.

Retirement

Registered accounts, government benefits and withdrawal order — modelled together, because they only make sense together.

Tax

Take-home pay after federal and regional tax and payroll deductions, for every Canadian province and territory and all 50 US states plus DC.

How to choose the right calculator

Start from the decision you are actually making, not from the number you want. If you are deciding whether to do something — buy instead of rent, borrow instead of save, retire at 60 instead of 65 — you want a comparison tool: rent vs. buy or the retirement planner. If you have already decided and want to know how much or how long, you want a projection: the mortgage, debt payoff, compound growth or FIRE calculators.

A second question is whose numbers you are using. The income tax calculator depends on published federal and state brackets and is only as current as those tables — it shows the date its figures were last verified. The mortgage, budgeting and net-worth calculators depend on nothing but what you type, so they never go stale.

If you are not sure where to start, the honest default is the budget calculator followed by the savings-rate calculator. Almost every other number on this page is downstream of how much you keep each month, and most people are surprised by their own figure.

Financial calculator FAQ

Do I need an account to use these calculators?

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No — every calculator on this page runs entirely in your browser, and needs no email address and no bank connection to give you an answer. A free account is what saves that answer and keeps it current against the real accounts behind the numbers.

Are these calculators specific to the US?

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The income tax calculator uses federal brackets, the standard deduction and FICA, and covers all 50 states plus Washington, D.C. The mortgage, budgeting, debt, net-worth and compound-growth calculators are arithmetic on your own inputs and work anywhere.

How current are the tax figures?

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Every page that depends on published tax figures shows the month those figures were last checked against the source — the IRS for federal brackets and FICA, each state’s revenue department for state ones — alongside a link to that source. The calculators that depend only on your own inputs carry a last-updated date for the page itself.

Can I share a calculation with someone?

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Yes. Changing an input updates the page URL, so copying the address bar sends someone the exact scenario you are looking at rather than a blank calculator.

Like what these numbers show you?

Connect your real accounts and Hunch keeps every calculation on this page current automatically.

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