Order-space calculator
How much heating oil do I need?
Estimate the gallons needed to reach a conservative target level from your current chart-based gallons. The result is planning space, not delivery authorization.
Field notes
Separate tank capacity from delivery space
- 01
Use a verified gauge-chart result for current gallons when the tank model and orientation are known.
- 02
A nominal tank capacity is not a promise that the same number of gallons can be delivered; headspace and current fuel matter.
- 03
Confirm the safe fill amount, minimum order, access, and delivery terms with the supplier before ordering.
Order / space
Estimate room to a planning target
If you just used the gauge calculator, its chart-based gallons transfer in this browser session.
Planning estimate
Order space
Shared tank data
Verified models available on this route
Route-specific question
One distinction that matters
Can I order the exact number this calculator shows?
No. It estimates space to a selected planning target. The supplier must confirm tank identity, current level, venting, safe fill, and delivery requirements.
Property transaction or missing history?
Use the measurement. Research the property record.
If you are buying, selling, or trying to explain an unknown tank, send the address. We cross-check public records, locate the correct agency route, and explain the next action.
Start a property record checkSource boundary
Official source material
Model values require manufacturer support; safety and removal guidance uses official public-agency material. Verification date: 2026-08-02.
- Granby U.S. vertical tank capacity chart
Manufacturer gallons-by-inch table used by the upstream gauge calculator; verified 2026-08-01.
- Maine Attorney General Consumer Law Guide: Heating Oil
Official consumer guidance on monitoring fuel level, requesting delivery, comparing quoted prices, and checking no-heat basics; reviewed 2026-08-02.
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