EEPROM Endurance Calculator
How long your EEPROM, flash or FRAM lasts at your write rate — with wear-leveling factored and fixes ranked.
A naive “save every loop()” kills an EEPROM cell in DAYS — 100k cycles at 10 writes/s is under 3 hours. Defences: write only on CHANGE, debounce writes with a timer, rotate a ring of addresses with a sequence counter, or batch state into one page write. EEPROM endurance is per-CELL: spreading 1 byte across 16 addresses multiplies life ×16 — exactly the slots input.
EEPROM Endurance Calculator computes how long EEPROM/flash settings storage survives your write rate — free, instant and private in your browser. IoT and appliance firmware authors persisting state without bricking the part use it to skip the datasheet algebra: type your numbers, read the answer with the substituted formula shown step by step, and share an exact permalink of the calculation.
About EEPROM Endurance Calculator
EEPROM Endurance Calculator computes how long EEPROM/flash settings storage survives your write rate using the standard engineering relation: life = endurance × wear-slots / writes-per-day; EEPROM 100k cycles, flash pages ~10k, FRAM ~∞. Worked live: saving a counter every 5 minutes kills a single EEPROM cell in under a year — 16 rotated slots stretch it past a decade. The result recalculates on every keystroke, the worked-example panel shows your numbers substituted into the formula, and the Copy permalink button encodes the inputs in the URL so a colleague opens exactly your calculation. Everything runs client-side — nothing you type leaves your device.
How to use EEPROM Endurance Calculator
- 1Enter your values — the tool starts with realistic defaults for this exact use case, so the worked example is meaningful immediately.
- 2Read the live result and the worked-example panel, which substitutes your numbers into the formula step by step.
- 3Adjust any input to compare scenarios, then use Copy result or Copy permalink to share the calculation.
Why use EEPROM Endurance Calculator?
- ✓Implements the real formula — life = endurance × wear-slots / writes-per-day — with the substitution shown, not a black box
- ✓Built for IoT and appliance firmware authors persisting state without bricking the part
- ✓Copy result and permalink buttons — share the exact calculation in a README, forum answer or design review
- ✓100% free, no sign-up, runs entirely in your browser (works offline once loaded)
Frequently asked questions
How do you calculate eeprom endurance?+
How long EEPROM/flash settings storage survives your write rate follows life = endurance × wear-slots / writes-per-day; EEPROM 100k cycles, flash pages ~10k, FRAM ~∞. For example, saving a counter every 5 minutes kills a single EEPROM cell in under a year — 16 rotated slots stretch it past a decade. The calculator applies the same relation and shows the substituted arithmetic so you can verify every step.
How fast can careless code destroy an EEPROM?+
A save in loop() at 100 Hz exhausts 100 000 cycles in under 20 minutes. The classic defences: write only on CHANGE, debounce with a timer (e.g. settle 10 s before saving), and use update() style calls that skip identical bytes.
What's wear leveling and do I need to write it myself?+
Spreading writes across many cells so each sees a fraction: a ring of 16 addresses with a sequence byte multiplies life ×16. ESP32's NVS and most filesystems (LittleFS) level automatically; raw AVR EEPROM leaves it to you. FRAM simply removes the problem at ~10¹⁴ cycles.
Is the EEPROM Endurance Calculator free and private?+
Yes — completely free with no sign-up or usage limits, and it runs entirely in your browser: the values you enter are never uploaded or stored on a server.
Related Electronics tools
PCB Trace Width Calculator (IPC-2221)
Minimum trace width for your current and temperature rise — IPC-2221 formula with copper weight, layer choice and a step-by-step worked example.
● LiveMicrostrip Impedance Calculator
Z₀ of a surface microstrip from width, height and εr (IPC-2141A), plus effective dielectric constant and propagation delay.
● LiveStripline Impedance Calculator
Characteristic impedance of an embedded stripline trace from geometry and εr — the inner-layer companion to the microstrip tool.
● Live