Direct mail math.
Without the spreadsheet.
Free interactive calculators for the people who buy, plan, or sell direct mail. Postage by sortation tier with current USPS rates, ROI on a real campaign, letter-shop revenue models, and NCOA quoting — built by the team running the DirectMail.io platform. No login, no email gate.
- Free calculator
USPS Postage Estimator
Estimate per-piece and total postage by sortation tier. 2026 USPS rates for Marketing Mail and First-Class — Pre-sort Local Entry, Drop-ship NDC/SCF/DDU, and Co-mingle pooling.
- Marketing Mail and First-Class rates
- Pre-sort, Drop-ship, and Co-mingle math
- Per-piece, total, and savings vs single-piece
- In-home window estimate per tier
- Coming soon
Direct Mail ROI Calculator
Drop in your list size, response rate, average order value, and unit costs. Get response rate, CPA, ROAS, and break-even response side by side.
- Response rate to revenue math
- CPA, ROAS, and payback
- Break-even response benchmark
- Coming soon
Letter Shop Revenue Calculator
For printers adding direct mail. Model per-client revenue from data, design, postal, and omni-channel services. Project annualized run-rate at 5, 10, 25 active clients.
- Per-client monthly recurring revenue
- Service-line margin breakdown
- Annualized scenarios at 5/10/25 clients
- Coming soon
NCOA Quote Estimator
Estimate the cost of running NCOA, CASS, and DPV against your list. Compare per-record pricing across volume tiers, with and without an annual commitment.
- NCOA + CASS + DPV per-record pricing
- Volume-tier comparison
- Annual vs. on-demand cost
Stop estimating. Start mailing.
DirectMail.io applies the optimal sortation, drop-ship, and co-mingle rate automatically per drop — no calculators required when the platform is doing the math.