SubeR

MADE TO BE USEFUL

Useful tools.
Less figuring out.

Quick calculations for everyday life, plus guided prompts for your favourite AI. Pick a category or search for what you need.

19 practical toolsFree · no accountInputs stay on this page

19 practical tools

Shopping

Unit price comparison

Compare two pack sizes, including multipacks, on equal terms.

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Shopping

Product comparison

Enter 2–4 products and compare their specifications, sources and known costs side by side.

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Home projects

Flooring & tile estimator

Turn room measurements into area and whole packs to buy.

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Home projects

Paint quantity estimator

Estimate litres for walls, coats and the coverage on your paint tin.

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Kitchen

Recipe scaler

Resize ingredient amounts for more or fewer servings.

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Everyday

Split a bill

Add a chosen tax and tip, then split a bill down to the cent.

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Shopping

Sale price calculator

See the real result of two successive discounts and optional tax.

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Everyday

Time between two times

Count hours and minutes, including overnight plans and breaks.

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Everyday

Everyday unit converter

Convert length, weight, volume and temperature with clear units.

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AI helpers

AI prompt builder

Build a better prompt for a plan, explanation or ideas, then get the answer in your AI.

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Travel

Trip fuel & shared costs

Estimate fuel, parking and tolls for a trip, then divide the total.

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Everyday

Calendar day planner

Count days between dates or add and subtract calendar days.

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Home projects

Soil & mulch estimator

Estimate loose material volume and the number of bags for a bed.

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Home projects

Appliance energy cost

Estimate electricity use from watts, running time and your rate.

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Everyday

Text tidy & word count

Count or tidy text, fix caps-lock case, or make random mixed caps locally.

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Shopping

Percentage calculator

Find a percentage of an amount or compare a change.

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AI helpers

AI writing helper

Turn a draft or rough notes into a focused rewriting request.

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AI helpers

AI decision brief

Compare real options against your priorities and deal-breakers.

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AI helpers

AI research brief

Ask a research question with clear scope and source checks.

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Ask your AI

Type a question for a service you choose. Only submitting a search sends its text.

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Opens without your text. Copy your question, then paste and send in Gemini.

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Provider accounts, privacy policies and any fees apply. These searches are separate from the tool above.