# Generator Wattage Calculator — Outage & RV generator sizing

> Outage & RV generator sizing (iPhone/iPad app by Mithun Edwin.)

- Source: https://appshunter.io/ios/app/generator-wattage-calculator/id6803647183 (this page in markdown: same URL + `.md`)
- Developer: [Mithun Edwin](https://appshunter.io/developer/6797961202)
- Category: Utilities, Reference
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.1 · 34 MB
- Languages: American English
- Released: 2026-08-31
- Data updated: 2026-10-29

## What is Generator Wattage Calculator?

Will your generator run it all at once? Tap what you plug in and see your running watts, the starting surge of the biggest motor, and what is left on your generator. No generator yet? Get the size to buy.

Made for power outages, storm and hurricane prep, RV trips, camping and job sites. Works offline, even when the power and internet are down.

HOW IT WORKS
• Tap what you plug in: fridge, freezer, sump pump, well pump, furnace fan, window AC, space heater, microwave, CPAP, Wi-Fi, TV, RV air conditioner, saws, compressors and more
• Add your own items with their running and starting watts
• See running watts, starting (surge) watts and what is left
• Motors that cannot start are flagged, even when running watts fit
• Size to buy: the running and starting watts to look for on a portable or inverter generator before you spend
• Kits for storms, camping and the job site, each with its own generator
• Works the same way for a portable power station's inverter

FREE
• The full answer for up to 4 things at once

FULL PLAN (one-time unlock)
• Plan as many things as you need
• The full answer and size to buy for the whole plan
• Pay once. No subscription. Restore it on a new iPhone.
Bought the app before it was free? It stays unlocked.

Good to know
Numbers are typical watts for planning. Your appliances and generator may use more or less, so read the sticker on each unit. Never run a generator indoors or in a garage: carbon monoxide is silent and can kill. This app does not replace a licensed electrician or your generator manual.

No account. No ads. No tracking.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Full plan | $2.99 | one-time |


## Is Generator Wattage Calculator safe?

Not enough ratings yet to assess Generator Wattage Calculator.

## Is Generator Wattage Calculator legit?

Generator Wattage Calculator appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Generator Wattage Calculator is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 3 releases)

### 1.1.1 — 2026-10-23

Small fixes and improvements.

### 1.1.0 — 2026-09-29

Now free to download, with a new name.
• The full answer for up to 4 things, free
• New: Size to buy shows the running and starting watts to look for
• Starting watts now show for every plan
• Motors that cannot start are flagged, even when there is room left
• Kits bring back the generator you saved with them
• Quick first-use tips, an iPad layout and smoother animations
• Full plan: plan everything at once with a one-time unlock
Bought it before? It stays unlocked. Nothing to buy.

### 1.0 — 2026-09-01

No release notes.

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## More apps by Mithun Edwin

- [Food Label Decoder](https://appshunter.io/ios/app/food-label-decoder/id6797961200)
- [Tiny Tides: Duckling Rescue](https://appshunter.io/ios/app/tiny-tides-duckling-rescue/id6815904646)

All apps by Mithun Edwin: https://appshunter.io/developer/6797961202

## Related topics

[wattage calculator](https://appshunter.io/ios/topics/wattage-calculator) · [wattage](https://appshunter.io/ios/topics/wattage)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-29.*