About CalcPlanet
Our Mission
CalcPlanet provides free online calculators to help people understand everyday calculations. Our mission is to make methods, inputs and assumptions easier to inspect, whether you are checking a percentage, comparing a mortgage scenario or estimating materials.
Our English-language calculator library covers math, finance, health, crypto, science, engineering, business and daily life. Core calculators do not require an account. Results are estimates or mathematical outputs based on the inputs and assumptions described on each page, not professional advice.
Why CalcPlanet?
- 🌍 Free calculators for everyday math, planning and comparison
- ⚡ Standard calculations run in your browser; live-data features require a connection
- 📱 Layouts designed for phone, tablet and desktop
- 🌙 Dark & light theme — easy on your eyes, day or night
- 🌐 English-language explanations of methods and assumptions
- ₿ Cryptocurrency tools identify price inputs and estimation assumptions
- 💱 Currency tools distinguish supplied exchange rates from calculated conversions
- 🔒 Privacy-first — no account required, consent-based analytics and advertising, transparent data practices
- 📲 Accessible in a web browser without installing software
- 🔢 Documented formulas help you check the method behind a result
- 📚 Guides, worked examples and FAQs support understanding
Calculator Categories
Percentage, fractions, algebra, geometry, statistics, trigonometry — 60+ tools
Mortgage, loans, investments, savings, tax, retirement, FIRE — 80+ tools
BMI, calories, body fat, BMR, TDEE, macros, fitness — 40+ tools
Profit/loss, DCA, portfolio, staking, tax, mining — 20+ tools
Age, date, unit converter, time zones, recipes, budgeting — 40+ tools
YouTube, TikTok, Instagram, Patreon, newsletter revenue — 20+ tools
Amazon FBA, ROI, profit margin, SaaS metrics, pricing — 20+ tools
Physics, chemistry, energy, carbon footprint, environment — 15+ tools
Mean, SD, z-score, regression, hypothesis testing — 25+ tools
Electrical, mechanical, HVAC, fluid dynamics — 20+ tools
Concrete volume, flooring, roofing, drywall and lumber estimates
Length, weight, temperature, volume, speed, data — 25+ tools
Methods and Accountability
The CalcPlanet Editorial Team maintains calculator explanations and guides. Our approach is to:
- Use established mathematical and scientific methods, with relevant publications, government standards and financial sources where applicable
- Document formulas, units and assumptions so users can inspect the method
- Use worked examples to explain calculation steps
- Describe limitations rather than promise an outcome
- Use deterministic tests and regression cases, and review reproducible error reports
Read our full Data Accuracy & Formula Sources page and Editorial Standards for details.
Technology
CalcPlanet uses React and TypeScript for its web interface and calculator implementations. Standard calculations run in the browser. Features that use external data or optional cloud processing need a connection and may have different limitations. Analytics, advertising consent and optional cloud features are described in the Privacy Policy.
Get in Touch
Questions, bug reports, or calculator requests? Email info@calcplanet.com or visit our contact page.