ECOMMERCE TOOLKIT

Ecommerce calculators for clearer decisions

Orders, margin, returns, marketplaces, promotions, and fulfilment. Every calculator includes transparent assumptions, scenario comparison, and an action recommendation.

Reviewed August 8, 2026DeciCalc Editorial TeamIndependent methodology

Ecommerce professional planning — 8 specialist tools in this collection.

Choose a ecommerce calculator

Average Order Value

Measure realized revenue per completed order.

3 tailored inputs · Three scenarios · Full explanation

Open tool →02

Ecommerce Gross Margin

Measure revenue remaining after product, fulfilment, and payment costs.

3 tailored inputs · Three scenarios · Full explanation

Open tool →03

Contribution Margin

Measure order-level profit after every variable selling cost.

3 tailored inputs · Three scenarios · Full explanation

Open tool →04

Discount Profitability

Estimate unit profit after applying a promotional discount.

3 tailored inputs · Three scenarios · Full explanation

Open tool →05

Cart Conversion Rate

Measure the share of initiated carts that become completed orders.

3 tailored inputs · Three scenarios · Full explanation

Open tool →06

Product Return Cost

Estimate monthly margin lost to returns, processing, and unrecoverable merchandise.

3 tailored inputs · Three scenarios · Full explanation

Open tool →07

Free Shipping Threshold

Set an order threshold that protects target contribution after shipping.

3 tailored inputs · Three scenarios · Full explanation

Open tool →08

Marketplace Fee

Estimate net payout after platform commission and fixed transaction fees.

3 tailored inputs · Three scenarios · Full explanation

Open tool →

How to get a useful result

Use current source numbers and consistent reporting periods.
Review the conservative scenario before relying on the balanced result.
Read the formula, assumptions, and primary limitation on the calculator page.
Save or print the decision brief, then recalculate when a major input changes.

Browse all 64 calculators →