About CalcNimbus
CalcNimbus is a free hub of online calculators and plain-English guides, built to help people make everyday money, home, health and school decisions with confidence.
Every calculator pairs an instant result with the actual formula, worked examples in US dollars and imperial units, common mistakes to avoid, and answers to the questions people really ask — so you can understand the number, not just read it.
Our mission
To make calculations that usually require specialized knowledge — like mortgage payments, take-home pay, debt payoff, compound interest or BMI — accessible to everyone, without losing the accuracy these topics demand.
How we build our content
- Research from primary sources. For regulated topics (taxes, lending, health) we start from authoritative US sources such as the IRS, the Consumer Financial Protection Bureau (CFPB), the Federal Reserve, the CDC and current federal guidance.
- Cross-checked math. Before publishing, every formula is verified by hand against a worked example, and figures like tax brackets and contribution limits are confirmed against at least two independent sources.
- Plain language. We translate technical terms into everyday English and show the formula on the page so you can check the result yourself.
- Kept up to date. Content that depends on rates, brackets or limits is reviewed at least once a year, or whenever a meaningful change happens. The last-updated date is shown on each page.
Responsible use of AI
We use AI tools to help draft and check consistency, but every page is reviewed by a person before publishing — especially for money and health topics (YMYL), where accuracy matters most.
About our results
Our calculators provide estimates for informational and planning purposes only. Results can vary with rounding, your specific situation, rule changes, or individual contract terms. For decisions with financial, legal or health consequences, please consult a qualified professional (a CPA, attorney, CFP® planner or physician).
What you'll find here
- Mortgage & Loans — mortgage payments, refinancing, auto and personal loans, debt payoff
- Investing & Retirement — compound interest, 401(k), savings goals
- Salary & Taxes — take-home pay, hourly-to-salary, sales tax
- Health & Body — BMI and body metrics
- Math, Home & Everyday — percentages, GPA, square footage, tips and more
Contact
Found an error? Have a calculator to suggest? We'd love to hear from you — see our Contact page. You can also read our Privacy Policy, Terms of Use and Cookie Policy.
About the author
Jeferson Bruno
Developer & Editor at CalcNimbus
Jeferson Bruno is the developer and editor behind CalcNimbus. He builds and maintains every calculator on the site and personally checks each formula by hand against authoritative US sources — the IRS, Federal Reserve, IOM, CDC, USDA and ACOG, among others. He also created and runs CalculoHub, a calculator platform with hundreds of tools, so the methods here come from someone who builds and operates calculator sites for a living.
More from the author: CalculoHub · Tavoren · Instagram
Last updated: June 19, 2026.