Business Calculators: Free Online Tools for Finance, Pricing and Growth

Most business decisions come down to a handful of numbers: what a loan really costs, how many units you need to sell before a product pays for itself, whether a margin is healthy, how long the cash in the bank will last. The calculators above put those numbers a few keystrokes away, without spreadsheets or sign-ups.

There are nine tools on this page. A full scientific calculator handles the maths itself: trigonometry, logarithms, powers, roots, factorials, percentages and a memory register, with keyboard support and a reusable history. The other eight are business calculators built around one question each: percentages, profit margin and markup, break-even, return on investment, loan payments, compound growth, cash runway, and discounts with sales tax.

Every result updates as you type, and each calculator shows the formula it uses so you can check the working or repeat it in your own spreadsheet. The sections below explain what each tool is for, with a worked example.

Quick Answer

Pick a calculator from the list on the left (or the strip at the top on a phone), type your figures, and read the headline result and the breakdown underneath it. Money calculators share one currency setting. Copy results puts a plain-text summary on your clipboard; Reset restores the example numbers. Each calculator has its own link, for example /business-calculators/#loan, so you can bookmark it or send it to a colleague.

Scientific Calculator

The scientific calculator works the way a physical one does, with a few conveniences from having a screen. The expression stays visible while you type, the result previews live, and pressing = moves the calculation into the history panel where a tap reuses its value. Ans inserts the previous answer, and the memory keys (MC, MR, M+, M−) keep a running figure between calculations.

DEG switches the angle unit between degrees and radians; it is remembered between visits. INV flips the function keys to their inverses: arcsine, arccosine and arctangent, e^x and 10^x in place of ln and log, the cube root in place of the square root, and x³ in place of x². Percent works as a postfix operator (50% is 0.5, so 200 × 10% is 20), and the factorial key accepts decimals through the gamma function.

Operator precedence follows the usual rules: functions, factorials and percentages bind tightest, then powers (right to left, so 2^3^2 is 2⁹), then multiplication and division, then addition and subtraction. A minus sign in front of a power applies after it, so −2² is −4, matching what you would write on paper. Implied multiplication is allowed: 2π, 3(4 + 1) and 2sin(30) all work. Unclosed brackets are closed for you when you press equals.

Percentage Calculator

The percentage calculator answers the four questions that come up most often in business arithmetic. What is X% of Y is the discount and commission case: 15% of 240 is 36. X is what percent of Y is the share case: 36 is 15% of 240. Percentage change compares two figures over time: from 200 to 250 is a 25% increase, from 250 to 200 is a 20% decrease, and the asymmetry is exactly why growth and decline rates should never be added together. Increase or decrease by X% applies a rate to a base: 240 increased by 15% is 276.

Profit Margin and Markup Calculator

Margin and markup describe the same gap between cost and price from two different sides, and mixing them up is one of the most expensive pricing mistakes a small business can make. Margin is profit as a share of the selling price; markup is profit as a share of the cost. On a product that costs $60 and sells for $100, the profit is $40, the gross margin is 40% and the markup is 66.7%.

The margin and markup calculator works in three directions. Give it cost and price and it returns both percentages. Give it cost and a target margin and it returns the price you need to charge: $60 at a 40% margin is $60 ÷ (1 − 0.40) = $100. Give it cost and a markup and it returns the price and the margin that markup actually delivers: a 50% markup on $60 is $90, which is only a 33.3% margin.

Break-Even Calculator

Break-even is the sales volume at which total revenue equals total costs. Below it the business loses money on the period; above it every extra unit adds its full contribution margin to profit. The break-even calculator needs three inputs: fixed costs for the period, the selling price per unit and the variable cost per unit.

With fixed costs of $12,000 a month, a price of $49 and a variable cost of $21, each unit contributes $28. Dividing $12,000 by $28 gives 428.6, so the business must sell 429 units, or about $21,021 of revenue, before it makes anything at all. Enter a target profit and the calculator adds it to the fixed costs to show the volume needed to reach it. The sensitivity table underneath shows how the break-even point moves if the price is changed by 5% or 10% in either direction, which is often a more useful planning number than the point itself.

ROI Calculator

Return on investment is the simplest way to compare what you got back with what you put in. The ROI calculator takes the amount invested, any additional costs, and the amount returned. Investing $10,000 and getting $13,500 back is a $3,500 profit and a 35% return.

A plain ROI figure ignores time, which makes a 35% return over two years look identical to 35% over ten. Enter a holding period and the calculator also shows the annualized return, the compound annual growth rate that would produce the same result: 35% over two years is about 16.2% a year. Use the annualized figure whenever you compare investments held for different lengths of time.

Loan and EMI Calculator

A fixed-rate loan is repaid in equal monthly instalments, called EMIs in many markets. Each payment covers that month's interest first and puts the remainder toward the balance, so early payments are mostly interest and late payments are mostly principal. The loan calculator shows the monthly payment, the total interest over the life of the loan, the payoff date and a year-by-year schedule; switch to the monthly view to see every payment.

Borrowing $25,000 over five years at 7.5% costs about $501 a month and roughly $5,057 in interest. Add an extra $100 a month and the calculator recomputes the schedule: the loan is paid off about eleven months sooner and the interest bill falls by around $1,000. The figures assume monthly compounding and no fees; your lender's quote may differ slightly because of rounding, fees or a different day-count convention.

Compound Growth Calculator

Compound growth applies each period's return to the previous balance, so growth accelerates over time. The compound growth calculator takes a starting amount, a monthly contribution, an annual return and a number of years, and lets you choose how often interest is compounded. $10,000 plus $200 a month at 7% compounded monthly grows to about $54,700 in ten years, of which $34,000 is money you put in and about $20,700 is growth.

Add an inflation rate and the calculator also shows what the final balance is worth in today's money, which is the number that matters for a savings goal. The year-by-year table separates contributions from earnings so you can see the point at which the growth starts to outpace what you add.

Cash Runway Calculator

Runway is how long a company can keep operating before the cash runs out. The cash runway calculator divides the cash in the bank by the net burn, which is monthly expenses minus monthly revenue. With $150,000 in the bank, $12,000 of monthly revenue and $30,000 of monthly expenses, the net burn is $18,000 and the runway is about 8.3 months.

Real businesses rarely burn cash at a constant rate, so the calculator also accepts monthly growth rates for revenue and expenses and projects the balance month by month. If revenue grows fast enough to overtake expenses, the projection reports the business as cash-flow positive instead of a runway. Investors and lenders generally want to see at least 12 to 18 months of runway; below six months, fundraising or cost cuts become urgent.

Discount and Sales Tax Calculator

The discount and tax calculator handles the two-step arithmetic of a sale: apply the discount to the price, then add sales tax, VAT or GST on the discounted amount. A $120 item at 15% off is $102; with 8% sales tax the final price is $110.16 and the overall saving is 15%. Enter a quantity to price a whole order, or switch to the second mode to work backwards from a tax-inclusive receipt to the net price and the tax portion.

Margin vs Markup Quick Reference

Because margin is measured against price and markup against cost, the same profit produces two different percentages. This table converts the common values.

A Note on Accuracy

These calculators use the standard formulas shown under each result and round only for display. They are planning tools, not quotes: lenders, tax authorities and brokers apply their own rounding rules, fees, day-count conventions and regional taxes. Check any figure you intend to act on against the actual terms you are offered, and treat the outputs as estimates rather than financial, tax or legal advice.

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