BFCBrilliance

The internet’s toolbox

A free tool for the job. Every time.

Calculators, planners and printables that give you a number you can act on — how much paint, how much concrete, how much XP. Every one comes with a guide showing exactly how it’s worked out.

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Printables
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printables
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How-To

Concrete Block Fill Calculator

Work out how many litres of grout or concrete fill a hollow block wall will need, plus how many bags to buy.

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Dehydration Risk Session Planner

Estimate how much body weight you could lose in a session and whether it passes the 2% dehydration threshold.

Open the tool →Lifestyle

Paint Drying Time Calculator

Estimate paint drying times with Sherwin-Williams guidance for dry-to-touch, recoating, and full cure.

Open the tool →Finance

Invoice Factoring Fee Calculator

Estimate how much cash you get from a factored invoice and the total fee in dollars.

Open the tool →Gaming

Raid Lockout Calculator

See how many weekly lockouts you need for a 50% or 90% chance of at least one drop.

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DNS Propagation Time Calculator

Estimate how long DNS changes may take to fully reach users worldwide.

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Appliance Running Cost Calculator

What one appliance actually costs to run per year, from its wattage and your own electricity rate - including what it costs while switched off.

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Battery Life Calculator

Runtime from capacity and draw - and why a 10,000 mAh power bank only delivers about 6,660 mAh at the USB port.

Open the tool →Gaming

Battle Pass Completion Calculator

Will you finish before the season ends? Weeklies do not scale with days left, which is why the answer is rarely what a simple average suggests.

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Print it out

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CMU Fill Takeoff Sheet

A one-page takeoff sheet for estimating hollow block fill and bag count before you go to the supplier.

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Dehydration Risk Session Planner

Use this sheet to plan a workout or hot-weather session and estimate whether planned drinking keeps you under the 2% dehydration threshold.

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Paint Drying Time Sheet

A quick reference for estimating when paint is dry, ready for another coat, and fully cured.

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Invoice Factoring Deal Worksheet

Fill this sheet out to compare factoring offers and see your net cash from one invoice.

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Raid Lockout Drop Planner

Track how many weekly clears you need to reach 50% and 90% odds of at least one drop.

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DNS Change Timing Sheet

Fill this in before publishing a DNS change so you know when old caches should be gone.

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Browse the library

Tech

27 tools

The tools, gadgets, AI, and software shaping how we live and work.

Gaming

27 tools

Minecraft, servers, and the games worth your time — tips, builds, and what's worth playing.

Finance

27 tools

Money, investing, side hustles, and building wealth — explained simply.

Lifestyle

27 tools

Habits, productivity, travel, and living well day to day.

Health

27 tools

Fitness, nutrition, and wellbeing backed by what works.

How-To

42 tools

Step-by-step guides that get you from stuck to done.

Gardening

26 tools

Beds, lawns, and what to plant when — working out what a garden actually needs.

Education

26 tools

Grades, study plans, and the maths of getting through a course.

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What everyone's talking about right now, broken down.

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