Calculator Factory

Estimate how your savings grow over time with compound interest.

Estimate monthly payments and total interest on a fixed-rate loan.

Calculate interest earned on a principal amount over time without compounding.

Find how much you need to save each month to reach a savings target.

Estimate how much regular monthly savings can grow over time.

Project how much your retirement savings could grow by your target retirement age.

Calculate return on investment as a percentage and dollar profit.

Estimate annual percentage rate from loan amount, finance charges, and term.

Calculate net worth as total assets minus total liabilities.

Calculate dividend yield from annual dividend and share price.

Estimate how long it takes to pay off debt with fixed monthly payments.

See how long it takes to pay off a credit card with fixed monthly payments.

Calculate your debt-to-income (DTI) ratio from monthly income and debt payments.

Plan debt payoff by targeting the smallest balances first for quick wins and momentum.

Plan debt payoff by targeting the highest interest rates first to minimize total interest.

Compare paying extra toward debt versus investing the same monthly amount over your time horizon.

Generate a full loan repayment schedule with periodic payments, total interest, and principal vs interest breakdown.

Estimate enterprise value using discounted free cash flow projections and a Gordon growth terminal value model.

Calculate net present value for a series of cash flows at a given discount rate to evaluate project profitability.

Calculate the internal rate of return for a cash flow series — the discount rate that sets NPV to zero.

Calculate weighted average cost of capital from equity and debt weights, costs, and the corporate tax rate.

Calculate the simple payback period — how long it takes to recover an initial investment from level annual cash flows.

Calculate your Body Mass Index from height and weight.

Estimate daily calorie needs based on weight, height, age, and activity level.

Estimate your basal metabolic rate — calories burned at rest.

Estimate total daily energy expenditure including activity.

Estimate body fat percentage using the US Navy circumference method.

Estimate a healthy weight range based on height using BMI guidelines.

Estimate monthly mortgage payments, total interest, and total cost for a home purchase.

Compare your current mortgage payment to a refinanced loan and estimate lifetime interest savings. Closing costs are not included.

Estimate the maximum home price you can afford based on income, debt, and down payment. Taxes, insurance, and HOA are not included.

Compare total cost of renting versus buying a home over a set number of years.

Compare fixed-rate and variable-rate mortgage costs over your expected hold period with risk guidance.

Estimate monthly cash flow, annual returns, and gross and net yield for a rental investment property.

Calculate net operating income and capitalization rate to evaluate property investment returns.

Calculate monthly and annual property cash flow with a full expense breakdown.

See how rental income from other units reduces your effective housing cost when living in the property.

Estimate closing costs and total cash required at closing based on home price, down payment, and closing cost percentage.

Calculate cash-on-cash return — annual pre-tax cash flow divided by total cash invested — for rental property and real estate investments.

Estimate capital gains deferral, boot, and tax savings from a like-kind exchange under IRC Section 1031.

Calculate the new rent, monthly increase, and total rent impact over a period after a percentage increase.

Calculate your Financial Independence Retire Early (FIRE) number and years until you reach it.

Find how much you need saved today to reach retirement without further contributions.

Estimate how long your retirement savings will last at a fixed monthly withdrawal rate.

Project your 401(k) balance at retirement including employer matching. Match caps and vesting schedules are not modeled.

Convert between major world currencies using daily ECB reference exchange rates.

Calculate your exact age in years, months, and days from your birth date.

Find the number of days and weeks between two dates.

Calculate percentages of a number, find what percent one value is of another, and compute percentage increase, decrease, and change.

Estimate monthly car payments, total interest, and full loan cost with clear interpretation of financing.

Compare total leasing and buying costs over the same period with pros, cons, and a clear recommendation.

Compare annual fuel and charging costs, multi-year totals, and break-even point for electric vs gas vehicles.

Compare investing a windfall all at once versus dollar-cost averaging over time with expected return projections.

Compare paying extra on your mortgage versus investing the same monthly amount over your time horizon.

Compare Roth and Traditional IRA outcomes after taxes based on your current and expected retirement tax rates.

Compare total wealth from reinvesting for growth versus taking dividend income over your investment horizon.

Estimate how much emergency savings you need based on expenses, risk tolerance, job stability, and dependents.

Break down an annual salary into monthly, weekly, daily, and effective hourly pay with practical interpretation.

Convert an hourly wage to annual, monthly, and weekly income based on your work schedule.

Estimate annual and monthly overtime income and see how extra hours affect total earnings.

Compare two job offers by total compensation, commute time, and effective hourly pay to decide which is truly better.

Calculate the true monthly and annual cost of commuting including fuel, parking, and tolls.

See how much you actually keep from a menu item after ingredients, fees, and a share of monthly store costs.

Find how many orders you need each month to cover bills and hit your profit goal.

Estimate the true monthly and annual cost of an employee beyond hourly wage.

Compare delivery app commissions with direct ordering fees to see which channel keeps more profit.

Find what price to charge to hit your target profit or margin after costs and fees.

Compare product profit and product profitability across menu items or products to see which actually makes the most money.

Find your reorder point, days until stockout, and stockout risk level for small business inventory planning.

See how long your business can survive with current cash, monthly revenue, and expenses — your small business cash burn and runway.

Compare lease vs buy equipment costs for your business — total cost, break-even point, and which option may fit better.

Can you afford to open a second location or expand your store? Estimate payback, added profit, and expansion risk.

Calculate profit, profit margin percentage, and markup percentage from revenue and cost.

Calculate selling price, gross profit, and profit margin from product cost and markup percentage.

Find how many units you must sell to cover fixed costs based on price and variable cost per unit.

Calculate the optimal order quantity that minimizes total inventory ordering and holding costs using the classic Wilson EOQ model.

Calculate safety stock and reorder point using demand variability, lead time, and a target service level Z-score.

Classify inventory items into A, B, and C categories by annual usage value to prioritize control efforts and cycle counts.

Measure inventory shrinkage as the difference between recorded book inventory and physical count, expressed in units and percentage.

Compare term life vs whole life insurance costs and see what investing the premium difference might grow to over time.

Estimate how much life insurance you may need based on income replacement, debts, education, and existing coverage.

Estimate how much disability insurance coverage you might need based on income, essential expenses, and existing benefits.

Estimate how much umbrella insurance you might need based on net worth, income, and current liability coverage limits.

Compare high vs low insurance deductible options — premium savings, break-even timing, and which may fit your emergency savings.

Calculate contribution margin per unit, margin ratio, and total contribution to cover fixed costs and profit.

Calculate cost of goods sold from beginning inventory, purchases, and ending inventory.

Measure short-term liquidity with working capital and the current ratio.

Generate straight-line, declining balance, or double declining balance depreciation schedules with book value trends.

Build a lease liability amortization schedule under IFRS 16 or ASC 842 with interest expense, principal reduction, and ending balance by period.

Calculate ending inventory and COGS using FIFO or weighted-average cost flow assumptions with purchase layer detail.

Apply IFRS lower of cost and NRV or US GAAP lower of cost or market to determine inventory carrying value and write-down.

Calculate book value, gain on disposal, and loss on disposal when selling or retiring a depreciated fixed asset.

Measure cash conversion cycle and operating cycle from days inventory outstanding, receivables, and payables.

Translate foreign subsidiary balances into functional currency using IAS 21-style closing, historical, and average exchange rates for monetary items, non-monetary items, and income.

Analyze accounts receivable by aging bucket, calculate past-due percentages, and flag collection risk concentrations in the 90+ day category.

Estimate the allowance for doubtful accounts using the percentage-of-receivables method or aging-based loss rates for each delinquency bucket.

Calculate the effective interest rate (EIR) on bonds issued at a premium or discount using iterative yield-to-maturity solving.

Build a bond premium or discount amortization schedule using the effective interest method or straight-line comparison.

Measure how efficiently inventory is sold and replaced — average inventory, turnover ratio, days inventory outstanding (DIO), and industry-aware interpretation.

Measure short-term liquidity with the current ratio, working capital, and a clear assessment — poor, adequate, strong, or potential excess idle assets.