Every calculation you need, answered in seconds.
Mortgages, compound interest, BMI, calories, GPA, salaries and more — 25 precise, free calculators for money, health, maths and everyday life — with the formula, a worked example and a full breakdown for every answer.
Calculator library
Tap any tool to open it below. Every calculator updates as you type and shows its full working — no sign-up, no waiting.
Mortgage Calculator
See your monthly payment, total interest and what you’ll really pay over the life of the loan.
Your numbers
Results update as you type — nothing is sent anywhere, it all runs on this page.
Frequently asked questions
Are these calculators really free?
Yes — every tool on this page is free, unlimited and needs no account, no download and no sign-up.
How accurate are the results?
Finance tools use the standard amortisation and compound-interest formulas used by lenders; health tools use the widely used Mifflin–St Jeor equation (TDEE) and WHO BMI bands. Results are estimates for planning — for a mortgage, tax or medical decision, confirm with a qualified professional.
Is my data private?
Yes. Every calculation runs entirely in your browser on this page. The numbers you type are never sent to or stored on a server.
Which currencies and units are supported?
Finance tools let you switch between US dollars, euros and pounds. Health and everyday tools support metric and imperial units where it matters — for example BMI, calories and the unit converter — so you can work in the units you know.
Can I use a result in my own work?
Absolutely — use the Copy or Download buttons in the workspace to take any result with you, with the full breakdown included.
About CalcWise
CalcWise was built for one job: give you a correct answer in seconds, without sign-up, paywalls, or clutter.
What we do
We publish 25 free calculators covering money, health, maths and everyday life — from mortgages and paychecks to BMI, GPA and inflation. Every tool runs entirely in your browser, shows its working, and lets you copy or download the result.
Who it is for
Home buyers comparing loans, renters weighing rent vs buy, employees checking take-home pay, students tracking GPA, and anyone who wants a quick, trustworthy number before making a bigger decision.
Free, with no catch
Every calculator is free and unlimited. We do not sell your inputs, require an account, or let anything influence a formula or result — calculations never leave your device.
Our standards
Finance tools use standard amortisation and tax-bracket methods; health tools use WHO BMI bands and the Mifflin–St Jeor equation. Every page shows its formula, a worked example, and its limits. Results are estimates — see our Disclaimer.
CalcWise — last updated October 2026.
Privacy Policy
Last updated: 14 October 2026
1. What we collect
Calculator inputs are processed only in your browser and are not transmitted to or stored on our servers. We do not require accounts, names, or email addresses to use any calculator.
2. Cookies
This site does not set tracking cookies for calculator use. If optional analytics or advertising services are enabled on a future deployed version, they will be described here first, and you can control cookies through your browser settings.
3. Analytics
If analytics is enabled, it collects aggregated, anonymised usage (pages visited, device type, country) to improve tools. It does not collect calculator inputs.
4. Your rights (GDPR / UK GDPR & US state laws)
You have rights to access, rectify, erase, and restrict processing of personal data, and to object to marketing. Since we do not store calculator inputs or hold accounts, there is no personal data held here to access, rectify or erase — cookie choices are controlled through your browser settings.
5. Children
CalcWise is not directed at children under 13 (16 in some EU states) and we do not knowingly collect their data.
6. Changes
We will post changes on this page with a new date.
Terms of Use
Last updated: 14 October 2026
1. Acceptance
By using CalcWise you accept these terms. If you do not agree, do not use the site.
2. The service
We provide free calculators and educational guides for general information. We may add, change, or remove tools without notice.
3. No professional advice
Results are estimates for planning only and are not financial, tax, legal, or medical advice. See Disclaimer. Consult a qualified professional for decisions.
4. Acceptable use
Do not misuse the site, attempt to disrupt it, scrape at abusive rates, or present results as guaranteed. You may link to and share tool pages and results for personal or editorial use with attribution.
5. Intellectual property
Site copy, design, and code are owned by CalcWise or licensors. Calculator results you generate are yours to use.
6. Liability
To the extent permitted by law, we are not liable for losses arising from reliance on estimates. The site is provided “as is” without warranties.
7. Governing law
These terms are governed by applicable law in your jurisdiction of use; mandatory consumer protections remain unaffected.
Disclaimer
Calculators are estimates, not financial advice
All CalcWise calculators provide estimates based on the inputs you enter and standard formulas. Actual mortgage, loan, tax, paycheck, retirement, and investment outcomes depend on lender terms, tax law, fees, market returns, and personal circumstances that a calculator cannot know.
Health disclaimer
BMI, calorie and TDEE results are general educational information, not medical advice or diagnosis. Speak to a clinician or registered dietitian for personal health decisions.
Tax disclaimer
Tax estimators use simplified brackets and standard deductions for illustration. They are not tax preparation and do not replace IRS, HMRC, or EU tax authority guidance or a tax professional.
Accuracy
We work to keep formulas current, but we do not guarantee completeness or that results are error-free. Verify important figures independently before signing contracts or filing.
Contact CalcWise
Questions, corrections, or a calculator you would like to see? Send us a message through our contact form — we read every message.
Check a calculation first
Most questions can be settled on the tool page itself: every calculator shows its formula, a worked example and a full breakdown. Use the Copy result or Download as .txt buttons in the workspace to save your exact inputs and result — attaching that breakdown to any message helps reproduce exactly what you saw.
Found an error?
Note the tool name, the inputs you used, and the result you expected, and compare it with the worked example on that tool's page. If the example and your result disagree, that is a genuine bug worth reporting.
Suggest a calculator
The library already covers 25 tools across money, health, maths, everyday life and dates. Good suggestions are specific: the calculation, who needs it, and an example with real numbers.
Send us a message
Blog & Guides
Plain-English guides with worked examples that link straight to the matching calculator.