Enter a budget and campaign length, pick CPM or CPC pricing, and adjust the benchmark CPM, CPC, and click-through rate to see what Reddit Ads should deliver: impressions, clicks, effective cost per click, and your daily budget against the $5 minimum. Advanced options add conversions, cost per conversion, revenue, and ROAS.
Reddit ad specs and benchmarks (2026)
The formats, sizes, and limits a Reddit campaign needs, in one place. Confirm the exact limits in Reddit Ads Manager before uploading; Reddit revises them.
| Format or setting | Spec | Notes |
|---|---|---|
| Promoted post (text / link) | Headline up to 300 characters (keep it under about 150 so it shows in full); optional body text; a display name, avatar, and call-to-action button | The core format: it looks like a post in the feed with a Promoted label |
| Image ad | 1080 x 1080 (1:1), 1080 x 1350 (4:5), 1440 x 1080 (4:3), or 1920 x 1080 (16:9); JPG or PNG; up to 3 MB | 4:5 takes the most screen on phones; keep text inside the safe area |
| Video ad | 16:9, 1:1, 4:5, or 9:16; MP4 or MOV; keep the file under 1 GB and the first 3 seconds self-explanatory | Sound-off by default in the feed; captions carry the message |
| Carousel ad | 2 to 6 cards at one shared ratio (1:1 or 4:5), each with its own headline and link | Good for product ranges and step-by-step stories |
| Conversation placement | The same image or video specs, shown inside comment threads under relevant posts | Reaches people already reading about the topic |
| Targeting | Communities (subreddits), interests, keywords, custom and lookalike audiences, location, device | Long-tail subreddits usually cost less per 1,000 than broad interests |
| Budget and bids | $5 minimum daily budget; CPM, CPC, or CPV bidding by objective | Most guides suggest $20 to $50 a day to learn anything from a test |
| 2026 benchmarks | CPM about $3.50 to $15 (typically $5 to $8); CPC about $0.50 to $4 (median near $1.25); feed CTR 0.3% to 1% | Published roundups, not Reddit figures; your auction results will differ |
How it works
Reddit Ads run on an auction, so there is no rate card; what a campaign costs depends on the audience you target, the placement, and the competition for it. This calculator uses the figures published in 2026 benchmark roundups as its defaults, and lets you replace every one of them with your own numbers. The defaults are a CPM of about $3.50 to $15, usually $5 to $8, and a median CPC near $1.25 inside a $0.50 to $4 range. They also include feed click-through rates of 0.3% to 1%, and Reddit's $5-per-day minimum budget.
Formulas. Under CPM pricing: Impressions = Budget / CPM x 1,000, Clicks = Impressions x CTR, Effective CPC = Budget / Clicks. Under CPC pricing: Clicks = Budget / CPC, Impressions = Clicks / CTR, Effective CPM = Budget / Impressions x 1,000. Daily budget = Budget / Days, flagged when it is under the $5 minimum. With the advanced fields: Conversions = Clicks x Conversion rate, Cost per conversion = Budget / Conversions, Revenue = Conversions x Revenue per conversion, ROAS = Revenue / Budget.
Treat every output as a planning estimate. The numbers that decide a real campaign only show up in Reddit Ads Manager once the campaign runs: CPM by subreddit, CTR by creative, and conversion rate by landing page. Long-tail subreddits of 50,000 to 200,000 members usually clear well below the platform-wide CPM. Tech and finance audiences clear well above it. Nothing here connects to a Reddit Ads account.
Advanced options add your landing-page conversion rate and revenue per conversion, which unlock estimated conversions, cost per conversion, revenue, and ROAS.
Everything runs in your browser. Your numbers are never sent to a server, and there is no signup or limit. Your last entries are remembered locally so the calculator is ready next time.
What you will see
- Estimated impressions
- How many times the ad should be shown for the budget at the CPM (or at the CPC and click-through rate you entered).
- Estimated clicks
- Impressions x click-through rate, or Budget / CPC under CPC pricing.
- Effective cost per click / Effective CPM
- The same campaign expressed in the other pricing model, so you can compare a CPM bid with a CPC bid.
- Daily budget
- Budget spread over the campaign length. Reddit requires at least $5 a day, and most guides suggest $20 to $50 a day to learn anything from a test.
- Estimated conversions, cost per conversion, revenue, ROAS
- Advanced outputs from your landing-page conversion rate and revenue per conversion. ROAS above 1.0 means the campaign returns more than it costs, before margins.
- Reddit ad specs
- The reference table under the calculator: formats, image and video sizes, file limits, and character limits for a promoted post.
Frequently asked questions
How much do Reddit ads cost?
In 2026 benchmark roundups, Reddit CPMs run from about $3.50 to $15 per 1,000 impressions, usually $5 to $8. CPCs run from about $0.50 to $4 with a median near $1.25. That is cheaper than LinkedIn and most Google Search audiences for comparable targeting. The minimum budget is $5 a day. Your real cost comes from the auction: tech and finance audiences cost several times the average, home and DIY communities cost less, and long-tail subreddits usually clear 30% to 50% below the platform median.
How does the calculator estimate impressions and clicks?
Under CPM pricing it divides the budget by the CPM and multiplies by 1,000 for impressions, then applies the click-through rate for clicks. Under CPC pricing it divides the budget by the CPC for clicks and works back to impressions through the click-through rate. Either way it shows the effective figure for the other model so bids are comparable, and the daily budget against Reddit's $5 minimum.
Should I bid CPM or CPC on Reddit?
CPM (impressions) suits awareness and video, where you want reach and Reddit charges for showing the ad whether or not anyone clicks. CPC suits traffic and conversion campaigns, where you only pay for the click. Run the same budget through both models here. If the effective CPC under CPM pricing is lower than the CPC benchmark for your audience, an impressions buy is the better deal. If it is higher, the reverse applies.
What click-through rate should I expect on Reddit?
Feed ads on Reddit commonly land between 0.3% and 1%, with plain, community-aware creative (a post that reads like a post, not a banner) at the top of that band. Start with the 0.5% default, then replace it with the rate from your first campaign report, which is the only number that reflects your creative and targeting.
What are the Reddit ad specs in 2026?
The reference table under the calculator lists them. Promoted posts take a headline of up to 300 characters. Image ads are 1080 x 1080 (1:1), 1080 x 1350 (4:5), 1440 x 1080 (4:3), or 1920 x 1080 (16:9), as JPG or PNG up to 3 MB. Video ads are 16:9, 1:1, 4:5, or 9:16. Carousels hold two to six cards. The daily minimum is $5. Confirm the exact limits in Reddit Ads Manager when you upload, since Reddit revises them.
What is a good ROAS for Reddit ads?
Published 2026 figures put typical Reddit campaigns between roughly 2x and 5x, with some consumer-tech advertisers reporting higher. Enter your landing-page conversion rate and revenue per conversion in the advanced fields to see what your assumptions imply. Anything below 1.0 loses money before margins. The fair comparison is against your other channels at the same budget.
Does this tool connect to my Reddit Ads account?
No. Nothing connects to Reddit; you enter the budget and benchmark figures yourself and the maths runs in your browser. Use your own Ads Manager numbers as soon as you have them, they beat any benchmark.
Is the Reddit ads cost calculator free?
Yes, free with no signup, running entirely in your browser. Nothing you enter is uploaded; your last entries are remembered locally so the calculator is ready next time.