About PropaneCostPerGallon.com
An independent, US-focused pricing resource for the 12 million households that heat with propane. Built and maintained by Digital Signet, a UK-based research and product firm.
Why we built this site
Most of the propane price information online is one of two things: marketing copy from a supplier trying to sell you a delivery, or a generic answer that quotes the national average and stops there. Neither is useful when you actually need to decide whether to fill your tank this week, switch suppliers, or rent versus buy.
We started PropaneCostPerGallon.com in early 2026 to publish the answer the supplier websites do not: a state-level price plus a household-specific calculation, both updated against EIA's weekly residential survey, with the full math shown so you can sanity-check it.
We are not a supplier. We do not sell propane. We do not own a tank. We earn a small referral fee when readers we send to a delivery partner end up buying from them, and we run a small number of clearly-labelled affiliate links to home-services providers. None of those relationships influence our pricing data, our methodology, or who we recommend. If a supplier offers us money to soften a recommendation, we say no in writing.
Who runs the site
Oliver runs Digital Signet, an independent research and product studio that builds data-led pricing and decision tools using public datasets. After 20 years as a solutions architect and tech lead across media, utilities, satellite, and data, he founded Digital Signet to apply autonomous AI development methodology to real software at scale. Reach out at oliver@digitalsignet.com.
How decisions get made
- Pricing data is sourced from the US Energy Information Administration Weekly Heating Fuels Survey (residential propane series). Site values are reviewed and refreshed against the most recent SHOPP release each month.
- Editorial direction (the "rent vs buy" framing, the "auto-delivery vs will-call" tradeoffs, the savings tactics surfaced) is set by Oliver. Drafts are produced via Digital Signet's autonomous AI development methodology and reviewed against the editorial framework before publication.
- Reader corrections are taken seriously. If you find an error, email us and we fix it within 48 hours.
- We update price data monthly at minimum, weekly during heating season (October to March).
What we publish, and what we do not
- Publish state-by-state residential propane prices
- Show our calculation methodology in full
- Explain the trade-offs between fuel options
- Disclose when a link is an affiliate
- Update price data on a stated cadence
- Correct mistakes when readers report them
- Sell propane, deliveries, or tanks
- Take undisclosed sponsorships
- Rank suppliers based on payment
- Auto-generate content with AI without human review
- Recommend products we have not personally evaluated
- Sell or rent your email address
Digital Signet uses large language models (Claude, GPT-4, others) to draft and quality-check content via the Signet autonomous-dev-team methodology. Editorial direction is set by humans; drafting is mostly automated; review depth scales with the site's tier. Reader-flagged errors are fixed within 48 hours of report.
About Digital Signet
Digital Signet is a UK-registered research and product firm. We build independent, data-led pricing tools across home-services categories where consumer information is fragmented, supplier-controlled, or hard to compare. PropaneCostPerGallon.com is one site in a small portfolio focused on US residential energy costs.
Other sites in the same portfolio you may find useful:
- BoilerReplacementCost.com, full-cost breakdowns for residential boiler replacement
- FurnaceInstallationCost.com, install costs, AFUE economics, fuel-type comparisons
- WaterHeaterInstallationCost.com, tank vs tankless, fuel choice, install scope
Editorial enquiries, data corrections, partnership requests: oliver@digitalsignet.com
Read next
The full methodology behind every number on the site.
Run the winter cost calculator with your home, state, and tank.
All 50 states, with cheapest and most expensive ranked.
Source: EIA SHOPP residential propane survey. Current data is the final release of the 2025/26 heating season (week ending 30 March 2026). EIA pauses weekly publication April-September; next release expected October 2026. Refreshed 26 May 2026.
Founder of Digital Signet, an independent research firm that builds data-led pricing and decision tools using public datasets. PropaneCostPerGallon.com is sourced from the EIA Weekly Heating Fuels Survey, with assumptions and refresh cadence documented on the methodology page.