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Floating calculator

FloatCalculator Floating calculator & converters for Android

Do the math. Keep your place.

FloatCalculator is a floating calculator for Android with currency, unit and time zone converters. Calculate in a movable, resizable window over other apps, then reopen your results from history. Saved exchange rates can be used offline.

View on Google Play

Free features · Optional Pro upgrade / Android 12+

FloatCalculator

Free calculator and conversion features

Everyday calculations

Add, subtract, multiply, and divide with parentheses and percentages. Preview the result as you type and edit the expression when needed.

Currency conversions

Convert preset currency pairs and swap direction with one tap. Update rates online, check their reference date, or use saved rates offline.

Unit conversions

Convert length, area, volume, speed, energy, weight, and temperature with preset unit pairs.

Time zone conversions

Enter a date and time, or tap Now, to convert between preset time zones.

Calculation and conversion history

Reopen past calculations and conversions, or delete entries you no longer need.

Floating controls and quick access

Move, resize, minimize, and adjust the window’s opacity. Add an optional Quick Settings tile to open the calculator.

Feedback that suits you

Turn spoken feedback and scale hints on or off, and choose a haptic strength.

Calculate while you keep your place

Check totals beside a page or message

Keep a shopping page, document or message open and enter the numbers in the floating calculator. Preview the result as you type, then reopen earlier work from calculation history.

Compare currencies, units and times

Use the included preset conversion pairs while reading prices, measurements or schedules. Pro lets you choose the currencies, units and time zones in each pair. Offline currency conversions use saved rates, so check their reference date.

How to use the floating calculator

Open FloatCalculator and allow Display over other apps in Android settings.
Open the floating window over the app you are using. Move or resize it, then enter a calculation or choose a currency, unit or time zone conversion.
Review the result and reopen it from history when needed. Connect to the internet to update exchange rates; check the displayed reference date when using saved rates offline.

Visual guide

Some images show Pro features, described below.

FloatCalculator Pro

More with Pro

Optional features, available through in-app purchase.

Choose your conversion pairs

Select the currencies, units, and time zones for each pair instead of using the presets.

Organize your history

Search and pin history entries, and add notes to keep their context.

More themes

Choose Gilded or Cobalt to change the calculator’s appearance.

Pro offers a monthly subscription or a one-time lifetime purchase. The monthly plan may offer a 7-day free trial; eligibility and terms are shown before purchase.

FloatCalculator

Before you start

Android 12 or later
Display over other apps permission
Internet access to update exchange rates and load purchase options

Exchange rates are reference values with a displayed reference date. Saved rates can be out of date and may differ from transaction rates. Use your bank or payment provider for an actual transaction quote.

Questions, answered

Can I convert currencies offline?

Yes, using exchange rates already saved on your device. An internet connection is needed to refresh them. Check the reference date before relying on a conversion.

Which conversions are included without Pro?

Preset currency, unit, and time zone pairs are included. Pro lets you choose the currencies, units, and time zones for each pair.

Can I reopen an earlier calculation?

Yes. The history includes past calculations and conversions. Searching, pinning, and adding notes are Pro features.