# CalculateYogi

> Free online calculators for math, finance, health, and more — 500+ calculators in English and Spanish, each with instant results, step-by-step solutions, worked-example presets, and cited sources.

CalculateYogi offers 500+ free online calculators across 19 categories. Every calculator shows the formula it uses, a step-by-step breakdown of the math, FAQs, and authoritative sources, with a named contributor and reviewer and a last-updated date. The full catalogue is available in English and in Spanish under /es/.

## Categories

- [Math Calculators](https://calculateyogi.com/math): percentage, fraction, algebra, and geometry
- [Finance Calculators](https://calculateyogi.com/finance): mortgage, loan, investment, and retirement
- [Health Calculators](https://calculateyogi.com/health): BMI, calorie, body-composition, and fitness
- [Conversion Calculators](https://calculateyogi.com/conversion): unit and measurement converters
- [Date & Time Calculators](https://calculateyogi.com/date-time): age, date difference, and duration
- [Statistics Calculators](https://calculateyogi.com/statistics): mean, deviation, probability, and inference
- [Science Calculators](https://calculateyogi.com/science): physics and chemistry
- [Engineering Calculators](https://calculateyogi.com/engineering): mechanical and electrical
- [Business Calculators](https://calculateyogi.com/business): ROI, margin, break-even, and SaaS metrics
- [Everyday Calculators](https://calculateyogi.com/everyday): practical daily-life tools
- [Construction Calculators](https://calculateyogi.com/construction): concrete, roofing, flooring, and materials
- [Education Calculators](https://calculateyogi.com/education): GPA, grades, and test scores
- [Technology Calculators](https://calculateyogi.com/technology): network, coding, AI/ML, and security
- [Food Calculators](https://calculateyogi.com/food): cooking, nutrition, and recipe scaling
- [Sports Calculators](https://calculateyogi.com/sports): pace, training load, and scoring
- [Climate & Environment Calculators](https://calculateyogi.com/climate-environment): weather, energy, and footprint
- [Agriculture & Ecology Calculators](https://calculateyogi.com/agriculture-ecology): crops, irrigation, and land
- [Social Media Calculators](https://calculateyogi.com/social-media): engagement, reach, and earnings
- [Other Calculators](https://calculateyogi.com/other): novelty and specialty tools

## Popular Calculators

- [Percentage Calculator](https://calculateyogi.com/math/percentage-calculator): percentages, increase/decrease, and reverse percentages with steps
- [BMI Calculator](https://calculateyogi.com/health/bmi-calculator): body mass index with category ranges
- [Mortgage Calculator](https://calculateyogi.com/finance/mortgage-calculator): payment, amortization schedule, and total interest
- [Age Calculator](https://calculateyogi.com/date-time/age-calculator): exact age and countdowns between dates
- [Height Calculator](https://calculateyogi.com/health/height-calculator): mid-parental and adult height prediction
- [College GPA Calculator](https://calculateyogi.com/education/college-gpa-calculator): weighted and unweighted GPA

## Languages

- [English catalogue](https://calculateyogi.com): all calculators in English
- [Spanish catalogue (Español)](https://calculateyogi.com/es): the full catalogue, fully localized

## Contact

- [Contact page](https://calculateyogi.com/contact): questions, corrections, and partnership requests
- [Contributors](https://calculateyogi.com/contributors): the experts who write and review our calculators

## Optional

- [Sitemap](https://calculateyogi.com/sitemap.xml): every calculator page in both languages
- [robots.txt](https://calculateyogi.com/robots.txt): crawl rules