How many postcards should you send? Estimate the households a campaign can reach — by mailing radius or by EDDM routes — then see a suggested mailer count and a budget range at PostKnock per-piece pricing. Every number here is an estimate.
Radius gives a rough “how big is my neighborhood” estimate from area and density. EDDM routes multiply by typical homes per USPS carrier route.
A circle of this radius around your business. Most local service campaigns target a 1–5 mile ring.
Assumption, not a count. Real density varies block to block. These are round, labeled placeholders — for an exact figure, pull addresses for your specific ZIPs or use a USPS EDDM route map.
Look up routes for your ZIPs on the USPS EDDM tool; each route shows its address count.
A residential USPS carrier route averages roughly 400–800 deliverable addresses.
Saturation (EDDM-style) mails 100%. Drop this if you’ll filter to a subset — e.g. homeowners only — from a list you import.
Per-piece pricing covers printing + USPS First-Class postage, paid from your wallet. Larger sizes cost a little more per piece; figures below are estimates.
Estimate only. Household counts come from a labeled, round density assumption (households per square mile) or your EDDM route inputs — not a verified address list. Response rates are a hedged industry range, not a guarantee. Confirm real address counts with the USPS EDDM tool or by importing your own list, and verify current pricing on the pricing page before you budget.
Once you know roughly how many households you want to reach, PostKnock turns that into a campaign. Run EDDM-style saturation mailing to blanket a set of routes, or import your own targeted list and mail a subset. Design your card in the in-app Design Studio (4×6, 6×9, 6×11), pay per piece from your wallet, and PostKnock handles printing and First-Class mailing — no minimums, no contracts.
Add a QR code to track scans, then layer a phone-call follow-up wave via the built-in Call Queue (a Pro feature) so your front desk works callbacks the day after the card lands. Pre-built playbooks for 50+ industries set up the multi-touch wave timing for you.
One honest caveat on lists: PostKnock does not integrate with a CRM, PMS, or phone system. To mail a targeted list, you export a CSV from your other software and import it — the import wizard auto-maps the columns. For everyone-in-the-neighborhood reach, EDDM-style saturation needs no list at all.
Start Free →Deliberately simple and transparent — you can sanity-check it on a napkin.
The density figures are round, labeled assumptions, not measured counts — actual households per square mile swing widely by neighborhood. Treat the radius estimate as a ballpark; for an exact number, look up real address counts in the USPS EDDM tool or import your own list.
Want to pressure-test the budget side? Run our EDDM cost estimator → or the postcard marketing ROI calculator →
Sources & assumptions
Direct-mail response-rate ranges are drawn from published industry benchmarks (e.g. the ANA/DMA Response Rate Report), which historically report house-list and prospect-list response in the low single-digit percentages; we use a conservative 2–5% estimated range here. Actual results vary widely by offer, list quality, vertical, and number of touches. Household-density figures are illustrative round numbers, not Census counts. USPS carrier-route address counts vary; confirm yours with the USPS EDDM tool. Per-piece pricing reflects PostKnock’s published Free and Pro rates and may change — see the pricing page. Nothing here is a guarantee of reach, deliverability, or results.
It depends on how big an area you want to cover and how much of it you want to saturate. This estimator gives you a ballpark: pick a radius (or a set of EDDM routes), choose a household-density assumption, and it returns an estimated address count and a suggested mailer quantity per wave. There’s no minimum on PostKnock, so you can start small — mail a single route or a few hundred imported addresses — and scale up once you see scans and callbacks. The numbers here are estimates, not verified counts.
The radius mode is a rough approximation: it multiplies the area of a circle by a labeled, round household-density assumption (households per square mile). Real density varies block to block, so treat it as a ballpark. For an exact count, use the EDDM-routes mode with figures from the USPS EDDM tool, which shows the actual address count per carrier route, or import your own address list. We deliberately keep the density numbers round and clearly marked as estimates rather than implying a precise dataset.
For neighborhood saturation, you don’t need a list at all — PostKnock offers EDDM-style saturation mailing that reaches every address on the routes you choose. For targeted mailing, you bring the list: export a CSV from your other software (a CRM, practice-management system, spreadsheet, or wherever your contacts live) and import it into PostKnock, where the import wizard auto-maps the columns. PostKnock does not integrate directly with CRMs, practice-management systems, or phone systems — contacts come in via CSV import only. PostKnock does not sell or rent purchased prospect lists.
Published industry benchmarks (such as the ANA/DMA Response Rate Report) typically report direct-mail response in the low single-digit percentages, varying widely by offer, list quality, and industry. This tool uses a conservative estimated 2–5% range to size potential responses — it is a planning range, not a guarantee. A strong offer, a tightly chosen area, multiple touches (PostKnock supports multi-wave playbooks of up to 5 waves), and a phone-call follow-up via the Call Queue on Pro all tend to lift response versus a single untargeted drop.
PostKnock charges a single per-piece price that includes printing and USPS First-Class postage, paid from your wallet — roughly $1.05 per 4×6 card on the Free plan and about $0.79 per 4×6 on Pro ($99/mo or $799/yr). Larger sizes (6×9, 6×11) cost a bit more per piece. Multiply your suggested mailer count by the per-piece price to ballpark a per-wave budget; the estimator does this for you. These are estimates — check the pricing page for current figures before committing a budget.
Design a postcard, pick your area or import a list, and let PostKnock print and mail it. Pay per piece from your wallet. No credit card to start.
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