Free Ecommerce Calculators

Browse our collection of free online ecommerce calculators. Each tool includes the formula, step-by-step instructions, and educational content to help you understand the math behind the numbers. No signup required — just enter your values and get instant results.

Skip to main contentSkip to secondary navigation
TheCalcUniverse
Light mode activated

E-Commerce Calculators

Know your numbers, grow your business. Our ecommerce calculators help you analyze profit margins, customer acquisition costs, return on ad spend, and seller fees across major platforms.

13 calculators

Profit Margin

E-Commerce
Calculate gross profit margin, markup percentage, and selling price. Converts between margin and markup with full profit breakdown.
★ 4.931K uses

COGS Calculator

E-Commerce
Calculate your Cost of Goods Sold using the inventory accounting formula. Includes gross profit margin and COGS as a percentage of revenue.
★ 4.918K uses

Break-Even Point

E-Commerce
Calculate your break-even point in units and revenue. Enter fixed costs, selling price, and variable cost per unit to find when your business becomes.
★ 4.910K uses

Amazon FBA

E-Commerce
Calculate Amazon FBA fees, net profit, ROI, and margin for any product. Includes referral fees (8-20%), weight-based fulfillment fees, monthly storage.
★ 4.910K uses

ROAS Calculator

E-Commerce
Calculate your ROAS and break-even ROAS based on gross margin. Determine if your advertising campaigns are truly profitable.
★ 4.918K uses

CAC Calculator

E-Commerce
Calculate customer acquisition cost and LTV:CAC ratio. Evaluate the efficiency of your marketing spend and payback period.
★ 4.911K uses

Margin Calculator

E-Commerce
Solve for Gross Margin %, Markup %, Cost, or Revenue — choose what you know and calculate what you need. Free, instant, and accurate.
★ 4.932K uses

SaaS LTV:CAC

E-Commerce
Calculate customer lifetime value (LTV), customer acquisition cost (CAC), LTV:CAC ratio, payback period, and the SaaS Magic Number.
★ 4.924K uses

Payment Fees

E-Commerce
Compare Stripe and PayPal transaction fees side by side. Enter your transaction amount to see the exact fee, net amount, effective rate, and monthly.
★ 4.924K uses

YouTube Revenue

E-Commerce
Estimate YouTube AdSense revenue from views, CPM, and RPM. Supports 7 niche CPM presets (gaming to finance), mid-roll ad modeling, engagement tracking.
★ 4.945K uses

Etsy Fee Calculator — Listing,

E-Commerce
Calculate all Etsy seller fees for any item: listing fee ($0.20), transaction fee (6.5%), payment processing (3% + $0.25), and optional offsite ads fee.
★ 4.953K uses

CPM & CPC Calculator —

E-Commerce
Calculate CPM (cost per mille) and CPC (cost per click) from ad spend, impressions, and clicks. Free, instant, and accurate.
★ 4.939K uses

Engagement Rate

E-Commerce
Calculate engagement rate for Instagram, TikTok, and X with platform-specific formulas. Includes influencer tier classification and benchmarks.
★ 4.945K uses

About E-Commerce Calculators

Know your numbers, grow your business. Our ecommerce calculators help you analyze profit margins, customer acquisition costs, return on ad spend, and seller fees across major platforms.

Browse our curated collection of e-commerce calculators below. Each tool includes detailed formulas, educational content, and real-time results. Use the 13 calculators in this category to make informed decisions, solve problems, and get accurate answers instantly.

Amazon FBA fee and profit calculators
ROAS and CAC analysis tools
Profit margin and break-even analysis
Platform-specific fee calculators for Etsy, Stripe, and PayPal

Frequently Asked Questions

Should I price based on markup or margin?

Use margin for profitability analysis and markup for pricing. Margin shows what percentage of each sale is profit; markup shows how much above cost you are charging. The profit margin calculator gives you both so you never confuse the two.

How do I know if my ROAS is good?

A 4:1 ROAS is generally healthy, but it depends on your margins. If your margin is 25%, you need at least 4:1 just to break even on ad spend. The ROAS calculator works alongside the margin calculator so you can set realistic targets.

What is a good LTV to CAC ratio?

A ratio of 3:1 or higher is the benchmark most investors look for. Below 1:1 means you spend more to acquire a customer than they will ever pay you. The SaaS LTV CAC calculator factors in churn rate, ARPU, and gross margin.

How much does Etsy take in fees?

Etsy charges a $0.20 listing fee, a 6.5% transaction fee on the sale price, plus a payment processing fee (about 3% + $0.25 in the US). The Etsy fees calculator shows exactly what you will net after all fees for any selling price.

CalcUniverse

345+ free, precise calculators for finance, math, health, science, and everyday life. No account needed.

Medical Disclaimer: The health and fitness calculators on this site are for informational and educational purposes only. They are not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with any questions about your health.

Financial Disclaimer: The finance calculators on this site are for informational purposes only and do not constitute financial advice. Results are estimates based on the inputs provided and may vary. Consult a qualified financial advisor before making investment or financial decisions.

© 2026 TheCalcUniverse. All results are for informational purposes only.

Fast, free, and privacy-first.