PM
Profit Margin Calculator
Get profit, margin %, and markup % from selling price and costs.
OpenOnline calculators
Free Business Calculators
All ZBI calculators in one clean business-grade hub. Choose a calculator below and the existing calculator preview opens exactly as before.
Instant, browser-based checks
No sign-up, no stored data and no backend requirement for these calculators. They support pricing, margin, inventory, financial KPI and general finance decisions.
Calculator library
Choose one of 24 online calculators
The main hub uses the same polished card system as the analyzers page. Individual calculator screens remain unchanged for stable functionality.
Business calculators
BE
Break-Even Calculator
Find break-even units and revenue from fixed costs and contribution margin.
OpenMU
Markup Calculator
Calculate selling price from cost and markup %, or markup from cost and price.
OpenCM
Contribution Margin Calculator
Calculate contribution margin and contribution margin ratio from selling price and variable cost.
OpenPI
Price Increase Calculator
Calculate a new price from a percentage increase or compare two prices.
OpenROI
ROI Calculator
Calculate return on investment from investment cost and return.
OpenInventory and operations calculators
ROP
Reorder Point Calculator
Compute when to reorder based on daily usage, lead time, and safety stock.
OpenINV
Inventory Turnover Calculator
Get turnover ratio and days in inventory from COGS and average inventory.
OpenSS
Safety Stock Calculator
Calculate safety stock from average and maximum daily usage and lead times.
OpenPP
Payback Period Calculator
Find how many years until initial investment is recovered from annual cash flow.
OpenPE
Price Elasticity Calculator
Calculate price elasticity of demand from old/new price and quantity.
OpenM/M
Markup vs Margin Calculator
Compare markup % and margin % from cost and selling price.
OpenFinancial KPI calculators
EBITDA
EBITDA Calculator
Calculate earnings before interest, taxes, depreciation and amortization.
OpenCR
Current Ratio Calculator
Calculate current ratio from current assets and current liabilities.
OpenOM
Operating Margin Calculator
Calculate operating margin % from operating profit and revenue.
OpenGP
Gross Profit Calculator
Calculate gross profit from revenue and cost of goods sold.
OpenDEP
Depreciation Calculator
Straight-line or declining balance depreciation.
OpenCOM
Commission Calculator
Calculate commission amount and net amount after commission.
OpenFinance and general calculators
%
Percentage Calculator
Calculate percentages, percentage change and ratios.
Open%+
Percentage Increase Calculator
Calculate a value after percentage increase or compare two numbers.
OpenDISC
Discount Calculator
Calculate final price after discount and savings amount.
OpenVAT
VAT Calculator
Add VAT to a price or remove VAT from gross value.
OpenINT
Interest Calculator
Calculate simple interest and total amount.
OpenCI
Compound Interest Calculator
Calculate final amount and interest earned with optional monthly contributions.
OpenFrom quick calculation to business control
Use calculators for fast decisions, then move to analyzers, templates or ZBI software when you need recurring control.