Math & Science Calculators Calculators
Eight free tools for classroom, lab, and everyday math — from full scientific functions to unit conversions across 12 categories.
This page groups every math and science tool on APluscalc — useful whether you're finishing homework, converting units for a lab report, or just curious how far a light-year really is.
All eight calculators show their working, not just a final answer — the Scientific Calculator keeps a visible expression history, and calculators like Unit Converter, Area & Volume, and Space display the formula alongside the result so you can check the math or reference it in a written assignment.
🔬 All Math & Science Calculators
🧭 Which Math or Science Calculator Should You Use?
Trigonometry, logs, or exponents
The Scientific Calculator covers the full range of functions students and engineers need.
Converting between units
The Unit Converter handles 300+ unit pairs across 12 categories — length, weight, volume, and more.
Working with fractions
The Fraction Calculator adds, subtracts, multiplies, and divides fractions with automatic simplification.
Geometry homework
The Area & Volume Calculator covers 15+ shapes with formulas built in.
Tracking your GPA
The GPA Calculator converts letter and percentage grades to the 4.0 scale, with credit-hour weighting.
❓ Frequently Asked Questions
❓ Do these calculators show their formulas?
Yes — each calculator page includes a formula explanation and worked examples alongside the tool itself.
❓ Can I use the Unit Converter for cooking measurements?
Yes, it covers common cooking-relevant conversions like volume and weight, along with scientific and engineering units.
❓ How many decimal places do the results show?
Most calculators round to a sensible precision for the unit involved (typically 2-6 decimal places) — the Scientific Calculator shows full floating-point precision, while unit and area conversions round to avoid implying more accuracy than the input supports.
❓ Can I convert between different speed units, like mph and m/s?
Yes, the Speed Calculator supports mph, km/h, m/s, and knots, so you can solve for speed, distance, or time in whichever unit your problem uses.