Clear, practical guides to everyday calculations: counting business days, working out an exact age, removing VAT and more. Each guide explains the method, walks through real worked examples with the assumptions stated, and links to the free Momentix tool that does the sum for you.
Money & CalculationsNew
A £22,000 loan at 6% over 5 years costs £425.32 a month and £3,519.30 in interest. Payment tables for 4%–10% and 3, 5 and 7 years, and how to scale them.
Ahad Noor6 min read
Money & CalculationsNew
A £30,000 salary gives £25,119.60 a year after tax and National Insurance in 2026/27: £2,093.30 a month. See pension and student loan effects.
Ahad Noor7 min read
Money & CalculationsNew
Saving £200 a month at 7% for 20 years grows to £104,185 on £48,000 paid in. Formula, a 3%/5%/7% table and why starting early beats saving more.
Ahad Noor7 min read
Freelancing & BusinessNew
£20 an hour is £39,000 a year at 37.5 hours a week or £41,600 at 40. Formula, a £10–£50 table, and how unpaid holidays change the answer.
Ahad Noor6 min read
Money & CalculationsNew
A £10,000 loan at 7% over 5 years costs £198.01 a month and £1,880.72 in interest. See the formula, a month-by-month table and how term and rate change it.
Ahad Noor7 min read
Money & CalculationsNew
Percentage change = (new − old) ÷ old × 100. Going from 40 to 50 is +25%. Worked examples, a quick table and the mistakes that give wrong answers.
Ahad Noor7 min read
Dates & TimeNew
Subtract the earlier date from the later one: 15 January to 3 October 2026 is 261 days. Worked examples, leap years, month-end rules and weeks.
Ahad Noor8 min read
Money & CalculationsNew
Paying £100 extra a month on a £10,000 loan at 7% saves £719.39 in interest and 22 months. Worked examples for overpayments and lump sums.
Ahad Noor8 min read
Money & CalculationsNew
15% of 80 is 12; 12 is 15% of 80; add 15% to 80 for 92; a 15% rise that ended at 92 started at 80. Four percentage questions, each with a worked example.
Ahad Noor7 min read
Money & CalculationsNew
How gross pay becomes take-home pay in 2026/27: Personal Allowance, tax bands, National Insurance, student loans, pensions and a salary table to £125,140.
Ahad Noor9 min read
Dates & TimeNew
11 business days is usually 15 calendar days, or 17 from a Friday. See examples from every weekday, a 1–15 day table, and how holidays change it.
Ahad Noor11 min read
Dates & TimeNew
Work out an exact age in years, months and days from a date of birth, on today’s date or any past or future date, including leap-day birthdays.
Ahad Noor8 min read
Money & CalculationsNew
Remove VAT by dividing the gross price by 1 plus the rate: 240 ÷ 1.20 = 200 net. Formulas, a 20% and 5% table, rounding tips and common mistakes.
Ahad Noor8 min read
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