Business Calculators(15)
Margin, ROI, business calculators
Margin Calculator
Calculate cost, selling price, and profit margin.
ROI Calculator
Calculate return on investment (ROI).
Markup Calculator
Calculate markup percentage and selling price from cost.
Payback Period Calculator
Calculate the time needed to recover an investment.
CAGR Calculator
Calculate compound annual growth rate over a period.
Employee Cost Calculator
Calculate total employee cost including insurance and severance.
Pricing Calculator
Determine selling price considering cost, target margin and tax.
NPV Calculator
Calculate Net Present Value.
IRR Calculator
Calculate Internal Rate of Return.
Depreciation Calculator
Calculate asset depreciation.
Inventory Turnover Calculator
Calculate inventory turnover.
CLV Calculator
Calculate Customer Lifetime Value.
Conversion Rate Calculator
Calculate conversion rate.
Salary Budget Calculator
Calculate labor cost budget.
YouTube Revenue Calculator
Estimate YouTube ad revenue by views and category.
Overview
The Business Calculator collection lets you easily perform essential business calculations including margin rate analysis, ROI (Return on Investment) evaluation, break-even point (BEP) estimation, VAT-inclusive and VAT-exclusive price conversion, and discount rate computation. Enter your cost and selling prices to instantly see your profit margin and markup rate, or analyze expected returns against initial investment to validate business feasibility. Calculate the exact sales volume needed to break even based on fixed costs, variable costs, and unit price, and quickly convert between VAT-inclusive and VAT-exclusive pricing when preparing quotations for clients. From startup planning to improving profitability of an existing business, these practical tools support data-driven business decisions at every stage.
Tips
- ✔Margin rate and markup rate are different concepts. Margin is calculated on the selling price (profit divided by selling price), while markup is based on cost (profit divided by cost). Distinguish them clearly when building your pricing strategy.
- ✔When calculating the break-even point, make sure to include all fixed costs such as rent, labor, and insurance, and all variable costs such as raw materials, packaging, and shipping for an accurate result.
- ✔A meaningful ROI calculation should factor in not only the initial investment but also operating expenses, opportunity costs, and the time value of money.
- ✔When applying the 10% Korean VAT, multiply the supply price by 1.1 to get the VAT-inclusive amount, or divide the total price by 1.1 to extract the supply price.
- ✔When setting discount rates, always verify that your minimum margin is preserved after the discount. Higher sales volume with lower margins can actually reduce overall profit.
- ✔In the early stages of a business, track monthly break-even performance and combine fixed-cost reduction with average transaction value increases for sustainable growth.
- ✔If you operate multiple product lines, compare the contribution margin (revenue minus variable costs) of each product and allocate marketing resources toward the most profitable ones.
- ✔In Korea, B2B quotations typically list prices excluding VAT, but consumer-facing transactions legally require VAT-inclusive total pricing. Use the correct format for your transaction type.
FAQ
Q. What is the difference between margin rate and markup rate?
Margin rate expresses profit as a percentage of the selling price: (selling price minus cost) divided by selling price times 100. Markup rate expresses profit as a percentage of cost: (selling price minus cost) divided by cost times 100. For example, a product costing KRW 8,000 sold at KRW 10,000 has a 20% margin but a 25% markup. Retail businesses tend to use margin rate more often, while manufacturers more commonly use markup rate.
Q. How do I calculate the break-even point (BEP)?
The break-even sales volume equals total fixed costs divided by (unit selling price minus unit variable cost). For example, if monthly fixed costs are KRW 5 million, the unit price is KRW 20,000, and the variable cost per unit is KRW 12,000, the BEP is 5,000,000 divided by (20,000 minus 12,000), which equals 625 units. To find the break-even revenue, divide fixed costs by the contribution margin ratio, where the contribution margin ratio is (selling price minus variable cost) divided by selling price.
Q. How is ROI (Return on Investment) calculated?
ROI is calculated as (net profit minus investment cost) divided by investment cost times 100. For example, if you invest KRW 10 million and earn KRW 13 million in net revenue, the ROI is (13 minus 10) divided by 10 times 100, which equals 30%. When comparing multiple investment options with different time horizons, use annualized ROI for a fair comparison.
Q. How do I convert between VAT-inclusive and VAT-exclusive prices?
Korea's VAT rate is 10%. To get the VAT-inclusive price from the supply price (VAT-exclusive), multiply by 1.1. To extract the supply price from a VAT-inclusive total, divide by 1.1. For example, a supply price of KRW 100,000 becomes KRW 110,000 with VAT. Conversely, from a VAT-inclusive price of KRW 110,000, the supply price is KRW 100,000 and the VAT portion is KRW 10,000.
Q. What is an appropriate margin rate to set?
Appropriate margin rates vary widely by industry. Typical averages are 20-50% for retail, 10-25% for wholesale, 60-70% for food service (based on ingredient cost), and 70-90% for IT and software. However, rates depend on competitive dynamics, brand value, and market positioning. Use industry averages as a reference but set your minimum margin based on your own fixed-cost structure.
Q. How do I analyze the impact of discounts on revenue and profit?
Discounts lower the average transaction value, so additional sales volume is needed to maintain the same profit. For example, if a product with a 40% margin is discounted by 20%, the margin drops to 25%, and sales volume must increase by over 60% to match the original profit. When planning a discount strategy, estimate price elasticity (the rate of demand increase per discount) and verify that projected post-discount sales exceed the break-even point.
Q. What is the difference between contribution margin and operating profit?
Contribution margin is revenue minus variable costs only, indicating how much each sale contributes toward covering fixed costs and generating profit. Operating profit is revenue minus both variable and fixed costs, reflecting the actual operating performance of the business. Use contribution margin ratio to compare profitability across individual products and operating profit margin to evaluate the overall business.
Related Categories
Financial calculations are essential for business financial planning, including loan interest for funding and compound return analysis for invested capital.
Tax calculations such as VAT filing on business revenue, business income tax estimation, and corporate tax projection are core components of profitability analysis.
Labor costs are the largest fixed expense for most businesses, so accurate salary and social insurance calculations directly affect profit and loss analysis.