Find the right calculator fast
OtherCalculators is a free library of online calculators for everyday decisions about money, work, home projects, school and dining out. It covers 9 categories and 97 tools, from state-by-state paycheck and 401(k) calculators to asphalt tonnage, bill splitting and AP score estimates. Every tool runs in your browser with no account and no app.
Paycheck Calculators
Estimate take-home pay after federal withholding, FICA, and state and local taxes, state by state—free, with no sign-up.
Finance Calculators
Plan your financial future with tools for car and personal loans, mortgages, aircraft financing, CD earnings, and retirement accounts.
Asphalt Calculators
Professional paving estimation tools for tonnage, volume, area, cost, and unit conversions—built for contractors and homeowners alike.
Math Calculators
Convert numbers between binary, decimal, hexadecimal and octal, with every step of the working shown—exact for numbers of any size, free, with no sign-up.
General Calculators
Everyday math tools covering scientific functions, sport statistics, rounding, and more—for students and professionals alike.
Tip Calculators
Work out a fair tip, split a bill across a group, and account for sales tax on a restaurant, salon, or delivery order—free, with no sign-up.
Tarmac Calculators
Precision tools for tarmac driveway costs, material tonnage, sub-base requirements, and resurfacing estimates—ideal for UK and EU projects.
AP Score Calculators
Estimate your AP exam score using official College Board weighting for multiple-choice and free-response sections.
Cost Calculators
A tree removal cost calculator, plus a router to the asphalt and tarmac cost calculators for driveway, resurfacing, repair and milling jobs.
What do you need to work out?
Eight of the questions people most often bring here, each linked to the tool that answers it. Don't see yours? Browse all 9 categories above.
- How much will I actually take home from my paycheck?
- California Paycheck Calculator →Federal, FICA and state tax withheld, with every other state one click away
- What will my monthly loan payment be?
- Auto & Personal Loan Calculator →Payment and total interest by rate and term
- How much sooner could I pay off my mortgage?
- Mortgage Payoff Calculator →Years and interest saved with extra or biweekly payments
- Am I getting my full 401(k) employer match?
- 401k Employer Match Calculator →The match you're capturing, and what you're leaving behind
- How much should I tip, and what's everyone's share?
- Bill Split Calculator →Tip, total and per-person split in one step
- How much asphalt do I need to order?
- Asphalt Tonnage Calculator →Length, width and depth turned into tons you can order
- What will a new tarmac driveway cost?
- Tarmac Driveway Cost Calculator →UK pricing per square metre, sub-base included
- What score will I get on my AP exam?
- AP Biology Score Calculator →College Board weighting turned into a 1–5 estimate
Featured calculators
- Asphalt
Asphalt Tons to Cubic Yards Calculator
Convert asphalt tons to cubic yards, or cubic yards to tons, at your mix density.
- Finance
Mortgage Payoff Calculator
Calculate how extra mortgage payments, biweekly payments, and lump sums can reduce your mortgage term and save interest.
- Finance
Roth Vs. Traditional 401k Calculator
Compare Roth vs Traditional 401(k) contributions to see which one is better for you.
- Finance
401k Employer Match Calculator
Calculate how much your employer will match your 401k contributions.
- Finance
401k Early Withdrawal Calculator
Calculate the penalty and tax implications of early 401(k) withdrawals.
- Cost
Tree Removal Cost Calculator
Price a tree removal from height, trunk diameter, tree type, condition and site access, with stump grinding and an itemized low-to-high range.
- Finance
Auto & Personal Loan Calculator
Monthly payment, total interest and amortization for a car or personal loan, with trade-in, down payment, sales tax and dealer fees.
- AP Score
AP Biology Score Calculator
Turn multiple-choice correct out of 60 and six free-response scores, two long and four short, into a 50/50 composite and an estimated 1–5 score.
- General
Rounding Calculator
Round numbers to the nearest whole number, decimal, or significant figure.
- General
Scientific Calculator
Run trigonometry, logarithms, powers, roots and factorials in degrees or radians, with brackets, π and e.
- General
Bitumen Calculator
Estimate bitumen quantity, volume, weight, asphalt binder content, spray rate, and roofing rolls.
- General
MOT Type 1 Sub-Base Calculator
Estimate how much MOT Type 1 sub-base you need in tonnes and cubic metres, for a driveway, patio, path, shed base or the foundation under tarmac.
- Tarmac
Tarmac Surface Cost Calculator
Calculate specialized tarmac surfacing costs for car parks, pathways, and private roads.
- Tip
Tip Calculator
Work out the tip on any bill, add sales tax, round the total up, or work backwards from a total you already paid.
Recently updated
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Straight answers, without the sign-up
Free, with no catch
No account, no app, no paywall and no “enter your email to see results”.
Private by design
Every calculation runs in your browser. The numbers you type never reach our servers and disappear when you close the tab.
Sourced, not guessed
Official figures from the IRS, the College Board and published industry standards are named on the page they're used on, and each page shows when it was last reviewed.
Built for more than one country
US tax rules, UK paving units, and metric and imperial measurements where it matters. Each calculator says which country's rules it follows.
Shared figures like IRS limits live in one place, so a number can't say one thing on one page and something else on another. Every change is logged publicly.
Common questions
What is OtherCalculators?
OtherCalculators is a free website of online calculators and everyday tools, built to answer practical questions fast: take-home pay, loan and mortgage payments, retirement contributions, tips, paving materials and exam scores. It currently has 97 calculators across 9 categories. Every tool works in your browser with no account or download.
Can I use OtherCalculators outside the United States?
Yes. The everyday tools, such as tips, bill splits, rounding and loan maths, work anywhere. Some calculators are built for a specific country's rules, and they say so: paycheck and 401(k) tools follow US federal and state tax rules, while the tarmac and MOT Type 1 tools use UK conventions and metric units.
Do you store the numbers I type in?
No. Every calculator runs entirely in your browser. What you enter is used only to show the result on your screen, and it is never sent to our servers, logged or saved. Refresh the page and it's gone. The site is ad-supported and uses aggregate analytics, as described in our privacy policy, but your calculator inputs are never part of that.
Where do the formulas and figures come from?
Each formula is written directly into the page, not borrowed from a third-party widget. Where an official body publishes the rule (the IRS for tax and 401(k) limits, the College Board for AP scoring, industry standards for paving densities), we follow it, name it on the page and pin it to a stated year. Cost figures are baselines, because real prices vary by region, supplier and season. Our methodology page explains how each category is built and reviewed.
Can I rely on the results for a quote, a bid or a tax filing?
Treat every result as a planning estimate. Use it to size a job, check a figure you've been given, or prepare questions for a professional. A real quote depends on site conditions and supplier pricing, and a tax filing depends on your full situation, so confirm anything you'll act on with a qualified professional or the official source.
What should I do if a result looks wrong?
First check the assumptions listed on the calculator page. A mismatch is usually a different density, tax year or rounding rule rather than a bug. If it still doesn't add up, send us the calculator name and the values you entered through the contact page. We'll check the formula against its source and log any correction in the changelog.
Good to know
Results are estimates
They're calculated from what you enter and haven't been reviewed against your specific project, plan or location.
Costs vary by place
Prices move with region, supplier and season. Use them to compare quotes, not as a market rate.
Rules are dated
Tax and standards-based figures carry a stated year. Check the source if that year has passed.
Our tools provide planning estimates for budgeting and education. They are not financial, tax, legal or engineering advice. Confirm any figure you plan to act on with a qualified professional or the original source.