# Blackout Math.Power Calculator — Calculate your power needs

> Realistic power outage and battery performance calculator for real-world conditions. (iPhone/iPad app by Yevheniia Borunova.)

- Source: https://appshunter.io/ios/app/blackout-mathpower-calculator/id6755345214 (this page in markdown: same URL + `.md`)
- Developer: [Yevheniia Borunova](https://appshunter.io/developer/1684316852)
- Category: Utilities, Developer Tools
- Price: Free with in-app purchases (on sale, was $2.99)
- Rating: 3.00/5 from 5 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 18 · 10 MB
- Languages: Armenian, Azerbaijani, Czech, Danish, Dutch, English, Finnish, French, Georgian, German and 18 more
- Released: 2025-11-18
- Data updated: 2026-06-07
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/blackout-mathpower-calculator/id6755345214/reviews.md

## What is Blackout Math.Power Calculator?

Blackout Math
Power Calculator for Real Blackouts

When power is unstable, guessing becomes expensive.
Wrong battery choices, unrealistic expectations, and incorrect calculations lead to wasted money and failed setups.

Blackout Math is not a generic calculator.
It is a practical decision-making tool designed for real power outages — helping you understand how long your power will actually last and which battery truly fits your needs.

No ideal numbers. No marketing promises.
Only realistic calculations for real conditions.

Know how long your power will last

Configure your battery type, capacity, and voltage — and Blackout Math will:
• calculate usable energy in Wh and kWh
• account for safe depth of discharge for each battery chemistry
• factor in inverter efficiency and real losses
• show realistic operating limits

No overestimation.
No dangerous assumptions.

See the real impact of your devices

Add any household appliances — lights, routers, laptops, refrigerators, boilers, heaters.
Specify power, quantity, and usage time, and the app will instantly:
• calculate real energy consumption
• show each device’s impact on total load
• determine actual runtime — not theoretical values

You’ll know exactly when power runs out.

Real charging time — not guesses

Blackout Math considers battery chemistry and charging limits to provide:
• accurate charging time estimates
• warnings about unsafe charging currents
• charging power based on voltage × amperage
• state-of-charge calculations from any starting level

No unrealistic “0 to 100%” promises.

Complex energy concepts, explained clearly

Blackout Math helps you understand:
• why usable energy is always lower than nominal
• what depth of discharge really means
• how inverter efficiency affects runtime
• how to choose batteries for real-world usage

No engineering background required.

Built for clarity and speed

Clean inputs, instant calculations, intuitive sliders, and light & dark themes — designed for fast, stress-free decisions when time matters.

Perfect for:
• planning during blackouts
• choosing portable power stations (EcoFlow, Bluetti, Anker)
• estimating backup time for apartments and houses
• selecting batteries for solar and backup systems
• analyzing and optimizing home energy usage

Blackout Math is built for real conditions.
It helps you avoid costly mistakes and make confident decisions — even under pressure.

Less guessing.
More certainty.
Better energy decisions.

## Key features

- Calculate usable battery energy (Wh/kWh)
- Factor in safe depth of discharge
- Account for inverter efficiency and losses
- Calculate real device energy consumption
- Estimate actual device runtime
- Provide accurate battery charging time estimates
- Explain complex energy concepts clearly

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

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


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/blackout-mathpower-calculator/id6755345214/reviews.md

### 1/5 — Paid users asked to pay again

*2026-04-29*

Previous paid users aren’t grandfathered into premium with the new IAP model

## Frequently asked questions about Blackout Math.Power Calculator

### What is Blackout Math?

Blackout Math is a specialized calculator designed to provide realistic estimates for power outage durations and battery performance. It goes beyond theoretical numbers to account for real-world factors like battery chemistry, inverter efficiency, and device usage.

### How does Blackout Math calculate usable battery energy?

Blackout Math calculates usable energy by considering the battery's nominal capacity, voltage, and a safe depth of discharge specific to its chemistry. It also factors in losses from the inverter to give you a realistic usable energy figure in Wh and kWh.

### Can Blackout Math estimate how long my devices will run?

Yes, you can add any household appliances by specifying their power, quantity, and usage time. The app will then calculate their real energy consumption and show each device's impact on the total load, determining the actual runtime.

### Does Blackout Math provide charging time estimates?

Yes, Blackout Math provides accurate charging time estimates by considering battery chemistry and charging limits. It also offers warnings about unsafe charging currents and calculates charging power based on voltage and amperage.

### Is Blackout Math suitable for planning portable power stations?

Absolutely. The app is perfect for choosing portable power stations from brands like EcoFlow, Bluetti, and Anker, as it helps estimate backup time and analyze energy usage for various devices.

### What is the age rating for Blackout Math?

Blackout Math has an age rating of 4+, making it suitable for a wide range of users. It is available on both iPhone and iPad devices.

### How often is Blackout Math updated?

The latest version of Blackout Math is 26.5, and it was last updated on April 14, 2026. This indicates a relatively active development cycle for the application.

### Does Blackout Math have ads?

No, Blackout Math does not contain advertisements. It is a completely ad-free application, allowing for an uninterrupted user experience.

## Version history (last 5 releases)

### 26.5 — 2026-04-14

In this update we improved overall app performance, enhanced stability, and made small interface and user experience improvements to make the app faster, smoother, and more enjoyable to use.

### 26.4.1 — 2026-03-12

In this update we improved overall app performance, enhanced stability, and made small interface and user experience improvements to make the app faster, smoother, and more enjoyable to use.

### 26.4 — 2026-03-11

In this update we improved overall app performance, enhanced stability, and made small interface and user experience improvements to make the app faster, smoother, and more enjoyable to use.

### 26.3.3 — 2026-02-24

General improvements and stability enhancements for a smoother, more comfortable experience.

### 26.3.2 — 2026-02-23

In this release, we expanded app localization and added support for Dutch (nl), Polish (pl), Korean (ko), and Japanese (ja).

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All apps by Yevheniia Borunova: https://appshunter.io/developer/1684316852

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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 2026-06-07.*