# Fill up today or wait a week?

A 14 gal tank costs $54.71 at today's average and $54.18 at DataSnack's number for seven days from now, $0.53 less.

At the US average pump price; a given station will differ.

- Now: $54.71
- In seven days: $54.18

## The working

The cost of one tank of regular gasoline at today's US average price, and at DataSnack's number for that price seven days from now.

| Step | Expression | Now | In seven days |
| - | - | - | - |
| One tank | `tank * gas` | $54.71 | $54.18 |

Each name in an expression is an input below or an earlier step.

## What this runs on

### DataSnack's models

- `gas`: [Gasoline at the pump](https://datasnack.ai/m/ch:b3c52887e1a9), $3.908 per gal now (2026-11-12), $3.870 per gal in seven days

### Your assumptions

- `tank`: Tank size, 14 gal (change it on the page)

Every model here is graded in public. Download the workbook and rebuild it.

## What this cannot tell you

It does not say what any one station will charge, and the seven-day number is a forecast with its own record.

## The record

The first answer is graded seven days after it is made.

Data: [CSV](https://datasnack.ai/feed/q/fill-up-or-wait.csv) · [JSON](https://datasnack.ai/feed/q/fill-up-or-wait.json) · [Workbook (Excel)](https://datasnack.ai/feed/q/fill-up-or-wait.xlsx)

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Canonical: https://datasnack.ai/q/fill-up-or-wait · Updated 13 Nov 2026 12:00 UTC · DataSnack forecasts are analysis, not investment advice.