Savings planning guide
Plan a realistic savings goal
Work backwards from a savings target and deadline, understand the monthly and weekly calculation, and test whether your current plan is on track.
Worked examples and clear methods
Practical guides for useful decisions.
Understand the method, follow a realistic example, avoid common mistakes and then use the connected calculator or planner.
23focused guides linked directly to working tools.
Choose a guide
Start with the question you need to answer.
Each guide explains assumptions and limitations instead of hiding them behind a result.
Browse free worksheets, data and embedsDeadline calculation guide
Calculate working-day deadlines correctly
Count working days from a start date, apply UK bank holidays by region, and download the maintained dates as CSV or JSON.
Project planning guide
Build a useful milestone plan
Turn a project window into outcome-based milestone dates, export the baseline to a spreadsheet or calendar, then adjust it for dependencies and contingency.
Event schedule guide
Build an event run sheet
Create a timed event agenda with activity durations, changeovers, notes, CSV and calendar exports, plus a worked schedule example and realistic contingency.
Tutoring guide
Plan a focused tutor session
Turn learning goals and a session length into a structured tutoring plan with check-in, explanation, guided practice, review and next steps.
Private reflection guide
Use a private mood check-in
Use a short mood and energy reflection without treating it as a diagnosis, and keep a copy only when and where you choose.
UK fuel-cost guide
Calculate a UK journey fuel cost
Convert UK MPG or litres per 100 km into journey fuel use, total cost, cost per mile and a per-traveller estimate.
Flooring measurement guide
Calculate flooring area and waste
Measure rectangular and irregular floors, add a stated waste allowance, and convert the order area into full packs without double-counting.
Margin and markup guide
Calculate profit margin and markup
Calculate gross profit, margin and markup from cost and selling price, then keep VAT, discounts, fees and overheads on a consistent basis.
Percentage change guide
Calculate percentage increase or decrease
Calculate percentage increase or decrease from an old and new value, understand why reversing the change gives a different percentage, and handle zero safely.
Image ratio guide
Calculate and preserve image aspect ratio
Reduce image dimensions to a ratio, calculate a matching width or height, and understand when resizing, cropping or padding changes the frame.
Mortgage planning guide
Estimate what you can borrow
Turn income, deposit, debts, term and an income multiplier into a headline mortgage figure, then understand why lenders still apply their own checks.
Annual leave guide
Calculate annual leave correctly
Calculate full and part-year holiday entitlement from working days and leave weeks, and understand how contracts and bank holidays affect the figure.
Tile quantity guide
Estimate floor tiles and boxes
Turn room and tile dimensions into whole tiles, boxes and cost with a visible waste allowance.
Time-zone guide
Convert meeting times safely
Convert a date and time between UTC offsets, handle daylight saving and confirm the result before scheduling.
Percentage comparison guide
Compare two values without a baseline
Calculate the symmetric percentage difference between two values and know when to use percentage change instead.
Activity energy guide
Estimate activity energy use
Use body weight, duration and a MET value to estimate calories burned for an activity.
Timesheet guide
Total a weekly timesheet
Turn daily shift start, end and break times into total paid hours, including overnight shifts.
Mortgage overpayment guide
Model mortgage overpayments
Estimate how a regular monthly overpayment shortens the term and reduces total interest in a fixed-rate model.
BMI screening guide
Understand a BMI result
Calculate BMI and a healthy-weight range while keeping the limitations of BMI as a screening figure visible.
Fuel economy guide
Convert MPG and L/100 km safely
Convert between UK MPG, US MPG, litres per 100 km and kilometres per litre without mixing gallon standards.
Bill splitting guide
Split bills and tips fairly
Calculate a tip, total and per-person amount and decide whether service charges are already included.
Concrete quantity guide
Estimate concrete bags and volume
Calculate slab volume and whole bags from length, width, depth and the bag coverage printed on the product.
Useful because it is specific.
Worked examples
See the inputs and result together before using your own values.
Visible assumptions
Understand units, counting rules and important boundaries.
Connected tools
Move directly from the explanation to a working calculator or planner.