Check Heating Oil Supply Weeks Against Delivery Lead — Free
A dip reading is litres; the order book thinks in delivery weeks. Divide each tank’s litres by its measured weekly burn and compare the supply weeks with the lead time your supplier actually quotes.
The proof surface
Heating-oil dip tags record the level at the tank. This converts those readings into weeks of supply and compares them with the order lead time, so the order is placed before the tank, not the weather, makes the decision.
Why the flat version breaks
Planning on the tank’s full capacity
Only the oil in the tank buys weeks; the gauge’s red zone is not supply.
Using last summer’s burn rate
Heating-degree demand changes the weekly figure by multiples, not percentages.
Waiting for the price to drop
A price bet made with less than a lead time of supply left is a bet against the house being warm.
How to work the oil supply gauge
Take the dip or gauge reading today. Two tanks on one system share the burn, so give each row the weekly draw that tank actually serves.
From the last full top-up: litres added divided by weeks since the one before. Winter burn can be double the shoulder-season figure — use the season you are heading into.
The quoted lead, plus the days a rural round or a cold snap historically adds. Three weeks is a working default only if your supplier has met it in this season.
The gauge holds the shortest supply. A three-hundred-litre back tank burning one hundred and fifty a week has two supply weeks against a three-week lead — that row alone justifies calling today.
What the oil supply gauge replaces
| Question | Before | Visible working |
|---|---|---|
| Planning on the tank’s full capacity | Only the oil in the tank buys weeks; the gauge’s red zone is not supply. | Measure the weekly burn honestly |
| Using last summer’s burn rate | Heating-degree demand changes the weekly figure by multiples, not percentages. | Enter the real delivery lead |
| Waiting for the price to drop | A price bet made with less than a lead time of supply left is a bet against the house being warm. | Order from the tightest tank |
A local arithmetic aid replaces hand calculation, not expert review. No paid AI service is needed.
Run it on the samples, right here
FIRST-LOAD
Input is processed locally and a draft is saved automatically in this browser profile when storage is available. Reset to sample clears that draft; Pro history has its own clear button. A state link encodes your inputs in its URL: share only non-sensitive rows. Browser history, clipboard and anyone receiving the link may retain it. Optional AI use below leaves this device; it is not required.
Supply arithmetic on the readings and lead times you supply. Not fuel-price advice, an energy-efficiency assessment or a delivery guarantee; confirm order thresholds, prices and lead times with your supplier, and follow carbon-monoxide and fire safety guidance for any appliance or tank.
Data note: Everything runs in this browser tab on the oil supply gauge: your tank | litres in the tank | litres burned per week stays on this device, nothing is uploaded, and the reading is rebuilt only when you press run.
Go deeper: the companion app files the same reading as a meter band gauge
The article demo above runs without limits. The companion app keeps a local history, exports the rows as CSV, prints the oil supply gauge reading, and holds your drafts on this device — one free run, then $ 4 one-time for the layer that keeps filing.
The oil supply gauge reading is complete for free. The optional $4 layer adds print, row CSV and the last five local reading summaries; it does not add hidden answers. Checkout is not configured yet; the article demo remains unlimited.
Open the check heating oil supply weeks against delivery lead companionBoundary
Supply arithmetic on the readings and lead times you supply. Not fuel-price advice, an energy-efficiency assessment or a delivery guarantee; confirm order thresholds, prices and lead times with your supplier, and follow carbon-monoxide and fire safety guidance for any appliance or tank.
What this is built on
- Method: The quoted lead, plus the days a rural round or a cold snap historically adds. Three weeks is a working default only if your supplier has met it in this season.
- All sample records are invented examples. The app does not fetch measurements, policies, files or personal records.
- Google’s official pricing page, fetched 2026-09-29, lists free-tier access including AI Studio. Optional formatting only; limits and availability can change. Free-tier content may be used to improve products. Never paste private records there.
Before: Only the oil in the tank buys weeks; the gauge’s red zone is not supply. After: the oil supply gauge shows the working beside each named row so the reader can change the assumption and inspect the consequence.
Optional AI formatting, not calculation
For this oil supply gauge, use the free AI Studio interface only if available to you, with no paid API key. Manual entry completes the same workflow for free. Supply only fictional or non-sensitive notes. Review its output against the source; never paste unresolved questions into the numeric rows.
Format my non-sensitive notes for a oil supply gauge. Return plain rows only: tank | litres in the tank | litres burned per week. Preserve supplied quantities exactly. Do not guess missing values; list questions separately. Do not calculate or add advice. I will check every row before pasting into the local tool.
Accepted schema: tank | litres in the tank | litres burned per week. No AI response is executed as code.