Calculator Nova
Free, transparent calculators that show their work — the visible formula, stated assumptions, cited sources, an interactive chart, and a dimension diagram for every tool.
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- Math — Percentages, fractions, exponents, geometry.
- Home & Construction — Paint, tile, square footage, materials.
- Everyday Utility — Volume, time, and daily-life tools.
- Finance — Interest, loans, savings, tax.
- Business — ROI, markup, break-even, ad metrics.
- Sports & Fitness — Pace, splits, training zones (informational).
- Automotive — Fuel cost, mileage, tire sizing.
- Cooking — Recipe scaling, conversions, bake times.
- School — GPA, grades, study planners.
- Tech — Aspect ratio, subnet, data units.
- Photography — Exposure, depth of field (post-launch).