Oil Tank RouteResidential field tools

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.

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Field notes

Separate tank capacity from delivery space

  1. 01

    Use a verified gauge-chart result for current gallons when the tank model and orientation are known.

  2. 02

    A nominal tank capacity is not a promise that the same number of gallons can be delivered; headspace and current fuel matter.

  3. 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.

Shared tank data

Verified models available on this route

Granby 204201P Standard 20Plus60 x 27 x 44 in / 275 galGranby Standard 20Plus product table and U.S. vertical capacity chart
Granby 205201P Standard 20Plus72 x 27 x 44 in / 330 galGranby Standard 20Plus product table and U.S. vertical capacity chart
Granby 208101 Standard30 x 27 x 44 in / 138 galGranby Standard residential tank product table and U.S. vertical capacity chart

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.

Source boundary

Official source material

Model values require manufacturer support; safety and removal guidance uses official public-agency material. Verification date: 2026-08-02.

  1. Granby U.S. vertical tank capacity chart

    Manufacturer gallons-by-inch table used by the upstream gauge calculator; verified 2026-08-01.

  2. 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.

Continue the route

Use the next tool only when the job changes.

05 / GaugeCalculate a gauge readingTurn a fraction or stick depth into chart-based gallons.09 / CostCalculate delivery costMultiply a supplier quote by gallons without hiding the data date.07 / UsageEstimate days remainingUse your own consumption rate to turn gallons into a fuel runway.