Life & fun · alternatives · 2026

24 alternatives to Accurate Battery Life Calculator

Estimate runtime in hours, weeks, months & years!

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.

1. 1
   Time Calc▲93

   Calculator to perform elementary operations on units of time

   2017 · 8mobile.org · its alternatives →

2. 2
   Life Battery▲4

   Make your life time easy to understand.

   2023 · kosuket-dev.github.io · its alternatives →

3. 3
   How Long Did I Work?▲100

   Time Range Calculator

   2022 · its alternatives →

4. 4
   Solar Panel Charge Time Calculator▲7

   Calculate time it takes to charge battery with solar panels

   2024 · its alternatives →

5. 5
   Date Calculator▲77

   Timekeeping companion, stay in sync with date & time

   2023 · play.google.com · its alternatives →

6. 6
   Time Flies▲91

   Embrace the finite, make every week count

   2023 · timeflies.dev · its alternatives →

7. 7
   Time to Time Calculator▲9

   Calculate time between two dates

   2024 · aaaenos.com · its alternatives →

8. 8
   Age Calculator▲11

   Calculate exact age in years, months, days

   2025 · age-calculator.info · its alternatives →

9. 9
   Power▲112

   Check your iPhone battery life easily from your Apple Watch

   2015 · surenix.me · its alternatives →

10. 10
    Free time calculator▲86

    How much free time do you have remaining?

    2018 · erikrood.com · its alternatives →

11. 11
    Life Expectancy Calculator -SoloThinking▲2

    Discover Your Estimated Lifespan and Check How Long You Live

    Jun 2026 · solothinking.com · its alternatives →

12. 12
    Age Calculator▲65

    Secrets of time: know your age instantly

    2023 · play.google.com · its alternatives →

13. 13
    Period-Calculator.com▲63

    Privacy-first period calendar with smart predictions 📅

    2020 · period-calculator.com · its alternatives →

14. 14
    EV Charge Calculator and News▲48

    Charging calculations made fast with the latest EV news

    2024 · ev-charge-calculator-website.vercel.app · its alternatives →

15. 15
    Life Expectancy Countdown Timer▲7

    Calculate and track your life expectancy

    2025 · myappz.com · its alternatives →

16. 16
    Battery Health: Monitor & Info▲8

    Calibrate your battery life and boost performance

    2025 · play.google.com · its alternatives →

17. 17
    Time Ago Calculator▲12

    Calculate the exact past time

    2024 · aaaenos.com · its alternatives →

18. 18
    Online Age Calculator▲2

    Calculate your exact age in years, months, days instantly

    May 2026 · free2tools.com · its alternatives →

19. 19
    timecalculator.in▲11

    Time calculator

    2025 · timecalculator.in · its alternatives →

20. 20
    CM BATTERIES▲1

    free lithium battery calculator for size, consumption, time

    Feb 2026 · cmbatteries.com · its alternatives →

21. 21
    RatedCalculator.com▲12

    Calculate Anything.

    2025 · ratedcalculator.com · its alternatives →

22. 22
    MyAgeCalc▲4

    Age calculator

    2025 · myagecalc.com · its alternatives →

23. 23GI
    Grams.io – calculate how long drug(s) stay in body▲50

    A half-life calculator that estimates how long a drug is in your body.

    2022 · grams.io · its alternatives →

24. 24
    Exact Age Calculator▲7

    Find your exact age in years, months, days, even seconds.

    2025 · ournethelps.com · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →