Free Online Calculators
Finance, math, health, construction, and everyday tools in one searchable catalog.
Your calculators
Mortgage Calculator — Payment, Affordability & Extra Savings
Estimate monthly mortgage costs, cash to close, amortization, and extra-payment savings, or plan an affordable home price from income, debts, and target DTI.
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Adult BMI Calculator — BMI, Healthy Weight & Chart
Calculate adult BMI in metric or US units. See the CDC category, healthy weight range for your height, distance to the range, formula, and a visual BMI chart.
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Car Loan Calculator — Payment, Budget, Payoff & Offers
Calculate a car payment from the complete deal, reverse a monthly budget, test extra-payment payoff, compare two offers, or estimate a lease.
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Loan Calculator - Payments, Payoff & Amortization
Calculate a fixed loan payment, model extra-payment payoff, estimate an affordable loan amount, compare offers, and inspect annual or monthly amortization.
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VAT Calculator — Add, Remove & Find VAT
Add VAT to a net price, remove VAT from a gross total, or find the effective VAT rate with currencies, rounding, formulas, and a clear tax breakdown.
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Area Calculator — Square Feet, Shapes, Rooms & Land
Calculate square footage for shapes, rooms, walls, roofs, and irregular land; include cutouts, waste, packages, cost, formulas, and diagrams.
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Wallpaper Calculator — Rolls, Pattern Repeat & Cost
Estimate wallpaper rolls for rooms or separate walls. Account for strip rounding, trim, straight or half-drop repeat, reserve, reusable offcuts, leftover length, and cost.
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Brick & Block Calculator — Wall, Mortar, Pallets & Cost
Estimate brick or concrete block walls with doors and windows. Calculate courses, units, waste, pallets, mortar bags, edge cuts, and material cost.
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Tile Calculator — Layout, Boxes, Grout & Cost
Estimate floor, wall, shower, or backsplash tile. Calculate rows, columns, cuts, waste, boxes, purchased coverage, grout, spare tiles, and material cost.
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Paint Calculator — Gallons, Liters, Cans & Cost
Estimate paint for rooms, walls, and ceilings. Subtract doors and windows, set coats and coverage, and see gallons or liters, cans, leftover paint, and cost.
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Alcohol Dilution Calculator — Blend ABV & Convert Proof
Dilute alcohol with water, blend two strengths, plan a target batch, or convert ABV and U.S. proof with formulas, tables, and a visual mixture breakdown.
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Quadratic Equation Calculator — Roots, Steps & Graph
Solve quadratic equations in standard or vertex form, or build one from roots. See real or complex roots, discriminant, vertex, steps, forms, points, and a graph.
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