Online calculators

Free Business Calculators

All ZBI calculators in one clean business-grade hub — 24 original tools plus 26 KPI calculators from the Business Control Library. Choose a calculator below and open the browser runtime instantly.

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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.

Download Excel templates

Calculator library

Choose one of 50 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

PM

Profit Margin Calculator

Get profit, margin %, and markup % from selling price and costs.

BE

Break-Even Calculator

Find break-even units and revenue from fixed costs and contribution margin.

MU

Markup Calculator

Calculate selling price from cost and markup %, or markup from cost and price.

CM

Contribution Margin Calculator

Calculate contribution margin and contribution margin ratio from selling price and variable cost.

DM

Discount Margin Calculator

Check discount impact on price, profit and margin.

Open

PI

Price Increase Calculator

Calculate a new price from a percentage increase or compare two prices.

ROI

ROI Calculator

Calculate return on investment from investment cost and return.

Inventory and operations calculators

ROP

Reorder Point Calculator

Compute when to reorder based on daily usage, lead time, and safety stock.

INV

Inventory Turnover Calculator

Get turnover ratio and days in inventory from COGS and average inventory.

SS

Safety Stock Calculator

Calculate safety stock from average and maximum daily usage and lead times.

PP

Payback Period Calculator

Find how many years until initial investment is recovered from annual cash flow.

PE

Price Elasticity Calculator

Calculate price elasticity of demand from old/new price and quantity.

M/M

Markup vs Margin Calculator

Compare markup % and margin % from cost and selling price.

Financial KPI calculators

EBITDA

EBITDA Calculator

Calculate earnings before interest, taxes, depreciation and amortization.

CR

Current Ratio Calculator

Calculate current ratio from current assets and current liabilities.

OM

Operating Margin Calculator

Calculate operating margin % from operating profit and revenue.

GP

Gross Profit Calculator

Calculate gross profit from revenue and cost of goods sold.

DEP

Depreciation Calculator

Straight-line or declining balance depreciation.

COM

Commission Calculator

Calculate commission amount and net amount after commission.

Finance and general calculators

%

Percentage Calculator

Calculate percentages, percentage change and ratios.

%+

Percentage Increase Calculator

Calculate a value after percentage increase or compare two numbers.

DISC

Discount Calculator

Calculate final price after discount and savings amount.

VAT

VAT Calculator

Add VAT to a price or remove VAT from gross value.

INT

Interest Calculator

Calculate simple interest and total amount.

CI

Compound Interest Calculator

Calculate final amount and interest earned with optional monthly contributions.

Manufacturing and operations KPIs

OEE

OEE Calculator

OEE % from availability, performance and quality.

CAP

Capacity Utilization Calculator

Actual output vs maximum capacity.

CPU

Cost Per Unit Calculator

Total production cost per unit.

TP

Throughput Calculator

Units produced per time period.

SCR

Scrap Rate Calculator

Scrap quantity vs total production.

YLD

Yield Calculator

Good output vs total input.

LP

Labor Productivity Calculator

Output units per labor hour.

SA

Schedule Adherence Calculator

Actual vs planned production.

OTP

On-Time Production Calculator

Orders completed on time.

DT

Downtime % Calculator

Downtime vs planned hours.

Financial and working capital KPIs

WC

Working Capital Calculator

Current assets minus liabilities.

QR

Quick Ratio Calculator

Acid-test ratio excluding inventory.

ROIC

ROIC Calculator

NOPAT vs invested capital.

CCC

Cash Conversion Cycle Calculator

DIO + DSO − DPO.

DSO

DSO Calculator

Receivables collection days.

Inventory KPI calculators

EOQ

EOQ Calculator

Economic order quantity.

ICC

Inventory Carrying Cost Calculator

Holding cost % of inventory.

DIO

Days Inventory Outstanding Calculator

Days inventory is held.

SO

Stockout Rate Calculator

Stockout events vs demand.

ACC

Inventory Accuracy Calculator

Cycle count accuracy %.

OBS

Obsolete Inventory % Calculator

Obsolete stock % of total.

ABC

ABC Classification Calculator

Class A SKU vs revenue share.

Profitability KPI calculators

PP

Product Profitability Calculator

SKU profit after overhead.

CP

Customer Profitability Calculator

Customer profit after service cost.

PPO

Profit Per Order Calculator

Profit per order after handling.

ASP

Average Selling Price Calculator

Revenue per unit sold.

From quick calculation to business control

Use calculators for fast decisions, then move to analyzers, templates or ZBI software when you need recurring control.

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