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ToolGrid AI

Free Everyday Calculators

112 free tools

Work out discounts, budgets, loans, tips, recipe quantities, fuel and electricity costs, dates, ages and unit conversions. Each calculator shows a worked example and explains its limits, so you can check the math behind everyday decisions at home, at work or while shopping.

112 matching tools

Monthly Budget BalanceCompare monthly income with housing, food, travel and other expenses.Emergency Fund PlannerEstimate a cash reserve from essential monthly expenses and months of cover.Subscription Cost CalculatorSee the annual cost of a monthly subscription and potential cancellation savings.Unit Price ComparisonCompare two package prices using quantities in the same unit.Multi-Buy SavingsCompare a multi-buy bundle with buying the same items individually.Successive Discount CalculatorApply two consecutive discounts without adding their percentages incorrectly.Cashback CalculatorEstimate cashback and effective purchase cost using a rate and reward cap.Installment Split CalculatorDivide a remaining purchase balance into equal interest-free installments.Hourly Pay to Annual SalaryEstimate gross weekly, monthly and annual pay from hourly wages.Annual Salary to Hourly PayConvert an annual gross salary into an equivalent hourly pay rate.Overtime Pay CalculatorCalculate regular pay and overtime pay using your chosen overtime multiplier.Freelance Hourly Rate PlannerEstimate a billable hourly rate from desired earnings and annual business costs.Project Quote CalculatorBuild a project estimate from hours, hourly rate, direct costs and contingency.Profit Margin CalculatorCalculate gross profit and margin from sales revenue and direct cost.Markup Price CalculatorSet a selling price by applying a markup percentage to your cost.Sales Commission CalculatorEstimate base pay plus percentage commission on eligible sales.Simple Interest CalculatorEstimate interest where the starting principal does not compound.Inflation Cost EstimatorProject how a price changes under a constant annual inflation assumption.Purchasing Power EstimatorEstimate the future buying power of a fixed amount using an inflation assumption.Proportional Rent SplitSplit rent between two people in proportion to their income or agreed weights.Rent to Income RatioCalculate the share of monthly take-home income spent on rent.Debt to Income RatioCompare monthly debt payments with monthly gross income.Fixed Payment Debt PayoffEstimate payoff time and interest with fixed monthly payments and no new charges.Home Down Payment PlannerCalculate a deposit target and the amount left to save.Manual Exchange Rate CalculatorConvert an amount with an exchange rate you supply and a percentage fee.Trip Budget PlannerEstimate accommodation, food, transport and activities for a trip.Event Budget AllocationAllocate an event budget across venue, food, other spending and contingency.Cost Per Use CalculatorCompare a purchase price with its expected lifetime number of uses.Upgrade Payback PeriodEstimate how long recurring savings take to recover an upfront upgrade cost.Price Increase DifferenceCompare old and new prices and estimate added annual cost from repeat purchases.Appliance Electricity CostEstimate appliance energy use and cost from watts, operating hours and your tariff.Electricity Meter UsageFind energy usage and charge from two cumulative meter readings.LED Replacement SavingsCompare electricity costs of old and new bulbs at your usage level.Battery Runtime EstimatorEstimate runtime from battery capacity, voltage, load and usable efficiency.Power Bank Charge EstimatorEstimate full phone charges using battery energy and transfer efficiency.Water Usage CostEstimate water volume and cost from flow rate and daily running time.Wall Paint QuantityEstimate liters of paint for wall area, openings, coats and coverage.Wallpaper Roll EstimateEstimate rolls by usable area with an explicit wastage allowance.Flooring Pack CalculatorEstimate flooring packs and purchase cost including a waste allowance.Tile Count CalculatorEstimate rectangular tiles needed for an area and waste allowance.Concrete Volume CalculatorEstimate concrete volume for a rectangular slab with an allowance.Room Area and PerimeterCalculate floor area and wall perimeter for a rectangular room.Room Volume CalculatorFind the volume of a rectangular room from its length, width and height.Curtain Fabric WidthEstimate total fabric width from window width and fullness factor.Equal Shelf SpacingFind equal clear gaps after accounting for shelf thickness.Moving Box VolumeEstimate the total external volume of identical moving boxes.Raised Bed Soil VolumeEstimate soil for a rectangular planter or raised garden bed.Mulch Quantity CalculatorCalculate mulch volume for a garden area and chosen layer depth.Grid Plant SpacingEstimate plants on a rectangular grid using a fixed spacing.Rainwater Collection EstimateEstimate collected rainwater from roof area, rainfall and collection efficiency.Recipe Ingredient ScalerScale an ingredient amount to a different number of servings.Baker’s Percentage CalculatorExpress an ingredient weight relative to flour weight.Dough Hydration PlannerCalculate water required for a target flour-based hydration.Coffee Brew RatioCalculate brewing water from coffee weight and a water-to-coffee ratio.Tea Batch QuantityScale tea and water for a chosen cup count and cup volume.Meal Cost Per ServingCalculate total meal cost and per-serving cost from ingredient and energy spending.Round Cake Pan ScalingScale a recipe between two round pans using their surface areas.Cooking Yield CalculatorCalculate cooked yield percentage and weight loss from raw and cooked weights.Freezer Portion CalculatorDivide a prepared batch into equal-weight portions.Weekly Grocery QuantityPlan a food quantity from daily portions, household size and planning days.Journey Fuel CostEstimate fuel volume and trip cost using distance and liters per 100 kilometers.Measured Fuel EconomyCalculate fuel economy from distance driven and fuel consumed.Monthly Commute CostCombine distance-based driving costs, parking and tolls for workdays.Distance Travel TimeEstimate travel duration from distance and constant average speed.Fuel Tank RangeEstimate driving range from available fuel and consumption.Electric Vehicle Trip CostEstimate charging energy and cost including a charging-efficiency allowance.EV Charging Time EstimateEstimate charging duration from capacity, charge levels and average charging power.Road Trip Cost SplitSplit fuel, accommodation and shared trip costs equally among travelers.Luggage Volume CalculatorEstimate rectangular luggage volume from external centimeter dimensions.Running Pace CalculatorFind minutes per kilometer and average speed from distance and elapsed minutes.Race Time Predictor at Fixed PaceEstimate finish time for a distance at your chosen constant pace.Speed to Running PaceConvert kilometers per hour into minutes per kilometer and per mile.Steps to DistanceEstimate walking distance using step count and your measured step length.Walking Time EstimateEstimate walking duration from distance and your chosen average speed.Cycling Time EstimateEstimate cycling duration including planned stops.Strength Workout VolumeCalculate weight moved from sets, repetitions and load per repetition.Estimated One Rep MaxEstimate a one-repetition maximum using the Epley formula for 1–10 repetitions.Macronutrient Calorie CalculatorCalculate food energy from grams of protein, carbohydrate and fat.Food Portion EnergyScale label calories from a stated serving weight to your portion weight.Weight Change TrackerCalculate numerical weight change between two measurements.Mean, Median and RangeCalculate mean, median, sum and range from a numeric list.Weighted Average CalculatorFind an average from matching lists of values and nonnegative weights.Final Exam Grade NeededEstimate the final-exam score required for a chosen overall course grade.Percentage to FractionConvert a percentage with up to four decimal places into a reduced fraction.Fraction SimplifierReduce a whole-number numerator and denominator to their simplest fraction.Ratio Share CalculatorSplit a total into two shares using an A:B ratio.GCD and LCM CalculatorFind the greatest common divisor and least common multiple of two positive integers.Percentage Point DifferenceDistinguish a percentage-point change from a relative percentage change.Temperature ConverterConvert Celsius, Fahrenheit and kelvin with absolute-zero validation.Pressure ConverterConvert pressure among pascals, kilopascals, bar and psi.Energy Unit ConverterConvert joules, kilojoules, food kilocalories and kilowatt-hours.Degrees and RadiansConvert angles between degrees and radians.Circle Area and CircumferenceCalculate a circle’s area, diameter and circumference from its radius.Triangle Area CalculatorFind triangle area using a base and perpendicular height.Right Triangle HypotenuseCalculate the hypotenuse of a right triangle from its two perpendicular sides.Cylinder Volume CalculatorCalculate a cylinder’s volume from radius and height.Density CalculatorCalculate mass density from a mass and volume you measure.Tip & Split CalculatorCalculate a tip and divide the total bill between people.Discount CalculatorFind the final price and savings from a percentage discount.Tax Inclusive / ExclusiveAdd tax or extract included tax using a rate you supply.Compound Savings CalculatorEstimate monthly compounded savings with end-of-month contributions.Savings Goal CalculatorFind the monthly saving needed to reach a target without interest.Date Difference CalculatorCount elapsed calendar days between two dates in UTC.Add / Subtract DaysMove a calendar date forward or backward by a number of days.Time Duration CalculatorAdd or subtract two durations written as hours:minutes:seconds.Aspect Ratio CalculatorSimplify an image ratio and calculate a matching height for a new width.Break-Even CalculatorEstimate the units needed to cover fixed costs at a chosen price.Percentage CalculatorWork out percentages, increases and decreases.Age CalculatorFind exact age in years, months and days.Unit ConverterConvert length, weight, area, volume and speed.BMI CalculatorWork out body mass index in metric or imperial units.Loan / EMI CalculatorMonthly payment, total interest and total cost of a loan.

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