Free Online Calculators

Verify whether your selected PC components are compatible across socket, RAM, PCIe, cooler, and PSU categories before you buy or build.

Estimate how much of your startup you own after YC funding and any subsequent raise.

Compare the true cost of two cars side-by-side across financing, fuel, insurance, maintenance, and depreciation.

Compare grocery items by price per calorie, protein, fiber, or fat to find the best nutritional value for your money.

Find the optimal weekly meal plan that hits your calorie and protein targets within your grocery budget.

Find out whether to upgrade your CPU, GPU, both, or neither based on your current specs, target games, and desired performance.

Evaluates whether to repair or replace your roof based on age, damage severity, material life, and cost-effectiveness.

Calculates whether to repair or replace a failing water heater based on age, symptoms, repair cost, and risk tolerance.

Estimate whether repairing or replacing your HVAC system is the smarter financial move based on age, efficiency, and quotes.

Compare annual operating costs of a standard AC system vs a heat pump (or hybrid) based on your climate, energy loads, and upfront cost difference.

Estimate a fair cost-share percentage for a boundary fence replacement or repair, and understand your negotiating position before talking to your neighbor.

Sanity-check whether a contractor's proposed heat pump capacity is likely undersized, oversized, or reasonable for your home.