Supported Features
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Dark Interface
Blackout Math.Power Calculator
Calculate your power needs
$2.99 · Designed for iPad
Also Included In
Calculate battery runtime, charging time, and real energy usage. No ideal numbers — only realistic results for real outages.
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.
Ratings & Reviews
General improvements and stability enhancements for a smoother, more comfortable experience.
The developer, Yevheniia Borunova, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
The developer indicated that this app supports the following accessibility features. Learn More
Information
- Seller
- Yevheniia Borunova
- Size
- 10.3 MB
- Category
- Utilities
- Compatibility
Requires iOS 18 or later.
- iPhone
Requires iOS 18 or later. - iPad
Requires iPadOS 18 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- Languages
English and 27 more
- English, Armenian, Azerbaijani, Czech, Danish, Dutch, Finnish, French, Georgian, German, Italian, Japanese, Kazakh, Korean, Kyrgyz, Norwegian Bokmål, Polish, Portuguese, Romanian, Simplified Chinese, Slovak, Spanish, Swedish, Tajik, Turkish, Turkmen, Ukrainian, Uzbek
- Age Rating
4+
- 4+
- Copyright
- Copyright © 2025 Melissun’s Team. All rights reserved. Copying, distribution, and use of the team’s materials without proper permission are prohibited.
