Settling a claim
After an accident or injury — get a starting estimate before talking to an attorney.
82 calculators · free forever
Numbers made friendly.
From mortgage math to settlement estimates — 82 calculators across 38 subjects, growing to 12,000+ this year. Peer-reviewed formulas, no sign-up, no fuss. Just answers.
Numora is a friendly library of free online calculators — built by engineers, editors, and domain reviewers who care about accuracy. Every formula is peer-reviewed against a primary source. Every calculation runs in your browser. Your data never leaves your device.
38 subjects
Pick your subject.
38 subjects, 82 tools. Top 12 by activity below.
Finance & Investment
18 calculators
Health & Medical
14 calculators
Crypto
0 calculators
Insurance
0 calculators
Real Estate
0 calculators
Tax & Salary
0 calculators
Legal
0 calculators
Lifestyle & Everyday
14 calculators
Construction & DIY
8 calculators
Cooking & Food
0 calculators
Marketing & Business
0 calculators
Travel
0 calculators
Trending this week
Most-loved calculators.
Refreshed weekly from usage. No paid placements — popularity is the only signal.
Editor's picks
A closer look at our biggest sections.
Money matters.
Loans, refinancing, retirement, taxes — the calculators that show up in every major financial decision.
Explore finance tools · 18 totalReal estate decisions.
Every number you'll want before signing — from FHA loan limits to closing costs by state.
Explore real estate toolsSettling a claim.
Settlement estimators with reviewer-validated methodology. Not legal advice — but a starting point for the conversation with your attorney.
Explore legal tools By life situation
What are you trying to figure out?
Calculators grouped by the problem you're solving — not by math subject.
Refinancing your home
Whether refinancing actually saves money, and the break-even on closing costs.
Buying insurance
Coverage you actually need and what it'll cost — auto, home, life, disability.
Filing taxes
Federal, state, self-employed, capital gains — find your bracket and what you'll owe.
Buying a home
From "can I afford this" to "what does closing day cost" — every number before signing.
Tracking fitness
Body composition and energy needs benchmarks — plan real changes, not guesses.
Why use Numora
82+
Calculators, cited.
Every formula ties to a primary source — CFPB, WHO, IRS, Freddie Mac, IUPAC. No black boxes.
0¢
Always free.
No sign-up, no paywalls, no feature gates. Calculators are free forever; ads live only on content.
100%
Private by design.
The math runs in your browser. The values you type never reach our servers.
Are these calculators free?
Yes. Every calculator is free with no sign-up, no paywalls, and no result limits. Modest display advertising lives only on content below the calculator itself.
How accurate are results?
Every formula is reviewed by a domain editor against a primary source (CFPB, WHO, IRS, IUPAC, Freddie Mac, etc.) and re-verified annually. Sources are cited on every calculator.
Can I embed a calculator?
Embeds are on the roadmap. If you'd like early access for a publication or educator portal, email us — we'll prioritize the most-requested tools.
Do you store my data?
No. Every calculation runs in your browser. The numbers you type never leave your device. Aggregate analytics (page views, country) can't identify an individual visitor.
What subjects do you cover?
Finance & Investment, Health & Medical, Crypto, Insurance, Real Estate, Tax & Salary, Legal, Lifestyle & Everyday, Construction & DIY, Cooking & Food, Marketing & Business, Travel, and more — 38 subjects in total.
Who builds the calculators?
Subject-matter editors and reviewers with domain credentials. YMYL calculators (money, health, tax) carry a visible reviewer byline.
About Numora
Calculators, built the right way.
We build the calculator library we always wanted — a single trustworthy place for quantitative questions that explains the number as well as computes it. Formulas are traced to a primary source, YMYL calculators carry a reviewer byline, and every assumption the engine makes is listed on the page.