Free Financial, Investment & Energy Calculators — Plus Powerful Online Tools
Make smarter financial, investment, and utility decisions with free online tools optimized for the USA, UK, Canada, and Australia. Accurately calculate mortgages, compounding investments, personal savings, household electricity costs, and solar energy returns in seconds.
Clean, private, and precise data tailored to help you optimize your personal wealth and household utility expenses. All calculators are free to use directly in your browser or embed into your website.
Most Popular Financial Calculators
Estimate your monthly mortgage payment, total interest, loan payoff, and complete homeownership costs including property taxes, insurance, PMI, and HOA fees.
Compare your current mortgage with a refinance using full payment schedules, closing costs, cash-out, points, break-even, interest, total cost, and payoff timing.
Estimate monthly loan payments, total interest, borrowing costs, amortization, and extra-payment impact for a standard fixed-rate amortizing installment loan.
Estimate credit card payoff time, interest cost, and payment changes for a revolving balance.
Estimate investment growth from an initial amount, regular contributions, return assumptions, fees, inflation and time.
Compare current and quoted car insurance premiums, switching costs, and deductible differences without inventing insurer rates.
Estimate digital-asset cost basis, net proceeds, realized gain or loss, and tax using a transparent effective rate.
Estimate a financial-independence target, savings rate, real return, and projected age when invested savings may reach the target.
Convert hourly and overtime pay to gross salary and estimate take-home pay from transparent deduction-rate assumptions.
Compare the estimated financial position of renting and buying over a selected period using mortgage cash flow, home equity, transaction costs, and alternative investment assumptions.
Estimate contribution margin, break-even customers and revenue, current operating profit, and startup-cost payback.
Calculate how regular monthly investments can grow over time. Compare your total contributions, estimated investment growth, fees, and inflation-adjusted future value.
Popular Solar & Energy Calculators
Estimate appliance load, inverter capacity, and solar panel requirements for your setup.
Estimate the running cost of an electrical device from its power use, time, and energy rate.
Compare appliance energy consumption and estimate daily, monthly, or yearly electricity cost.
Estimate charging energy, efficiency loss, session cost, monthly usage, and annual EV charging cost.
Estimate usable battery capacity, delivered energy, and backup runtime for a household load.
Estimate solar production, bill savings, payback time, lifetime return, and discounted net present value.
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Calculate mortgages, loans, savings, investment returns, retirement goals and other important financial decisions with free online calculators.
Calculate electricity use, appliance costs, solar system size, energy savings and payback with practical calculators.
Convert, resize, compress, crop, optimize and inspect images across popular formats without installing software.
Convert numbers, codes, formats and digital data quickly with simple browser-based conversion tools.
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