# FENa Calculator – Fraction % — Sodium Creatinine Ratio Solver

> Sodium Creatinine Ratio Solver (iPhone/iPad app by Krzysztof Gwiazda.)

- Source: https://appshunter.io/ios/app/fena-calculator-fraction/id6456524579 (this page in markdown: same URL + `.md`)
- Developer: [Krzysztof Gwiazda](https://appshunter.io/developer/1546740383)
- Category: Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 15 · 11 MB
- Languages: American English
- Released: 2023-08-02
- Data updated: 2026-11-12

## What is FENa Calculator?

# FENa Calculator – Fraction % 

Calculate FENa percentages quickly and accurately with a simple, powerful, and easy-to-use calculator. Enter your sodium and creatinine values, select your preferred units, and get instant percentage results using a straightforward mathematical formula.

Designed for speed, precision, and convenience, FENa Calculator makes working with numerical values, unit conversions, and percentage calculations effortless.

## FAST AND ACCURATE CALCULATIONS

Enter four values and instantly calculate the Fractional Excretion of Sodium (FENa) percentage.

The calculator automatically updates your result as you enter or change values, eliminating the need for manual calculations.

## FLEXIBLE UNIT CONVERSIONS

Switch between supported measurement units with a simple tap:

- Sodium: mmol/L and mEq/L
- Creatinine: mg/dL and µmol/L
- Automatic conversion between creatinine units
- Convenient unit selection for individual input fields

Work with your preferred units while maintaining consistent mathematical calculations.

## SIMPLE AND INTUITIVE INTERFACE

Everything you need is available on one screen.

- Four clearly organized numerical input fields
- Instant FENa percentage results
- Easy-to-use unit selection buttons
- Automatic result updates
- Support for decimal values
- Convenient number entry
- Clean and straightforward layout

No complicated menus or unnecessary steps. Just enter your numbers and view the result.

## PRECISE PERCENTAGE RESULTS

The calculator uses the standard FENa mathematical equation:

FENa (%) = (Urine Sodium × Plasma Creatinine × 100) / (Plasma Sodium × Urine Creatinine)

Results are displayed with up to two decimal places for convenient reading and comparison.

## BUILT FOR EVERYDAY CALCULATIONS

Whether you're working with numerical formulas, comparing values, or exploring unit conversions, FENa Calculator provides a convenient way to perform calculations in seconds.

## WHY CHOOSE FENa CALCULATOR?

- Fast percentage calculations
- Automatic formula processing
- Flexible measurement units
- Instant numerical results
- Simple one-screen design
- Decimal input support
- Easy switching between units
- No manual formula entry required

Make complex numerical formulas simple with FENa Calculator – Fraction %.

**Enter values. Switch units. Calculate instantly.**

## Is FENa Calculator safe?

Not enough ratings yet to assess FENa Calculator.

## Is FENa Calculator legit?

FENa Calculator – Fraction % appears to be a legitimate app. The AppsHunter Legitimacy Score for FENa Calculator is 90 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 2.0 — 2026-11-09

What's New in This Version:

• Improved decimal input with support for dots and commas.
• Enhanced number formatting based on regional settings.
• Improved FENa percentage calculations and result presentation.
• Updated unit conversion handling.
• Performance and stability improvements.

### 1.0.3 — 2024-01-08

EU GDPR consent form

### 1.0.2 — 2023-08-16

Minor bug fix

### 1.0.1 — 2023-08-02

Minor bug fix.

### 1.0 — 2023-08-02

No release notes.

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All apps by Krzysztof Gwiazda: https://appshunter.io/developer/1546740383

## Related topics

[fena calculator](https://appshunter.io/ios/topics/fena-calculator) · [sodium fena calculator](https://appshunter.io/ios/topics/sodium-fena-calculator) · [fens](https://appshunter.io/ios/topics/fens)

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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 2026-11-12.*