# CompoundWise > UK compound interest calculators and investing guides for beginners. CompoundWise helps UK savers and investors understand compound interest, compare ISA and pension options, and plan for financial goals using free interactive calculators. ## Calculators - [Compound Interest Calculator](https://compoundwise.co.uk/): Default calculator with principal, monthly contributions, interest rate, and time period inputs. Shows year-by-year breakdown and visual charts. - [UK Compound Interest Calculator](https://compoundwise.co.uk/compound-interest-calculator-uk): Tailored for UK savers with GBP defaults and UK-specific context. - [Monthly Compound Interest Calculator](https://compoundwise.co.uk/compound-interest-calculator-monthly): Focuses on monthly compounding frequency. - [Daily Compound Interest Calculator](https://compoundwise.co.uk/compound-interest-calculator-daily): Focuses on daily compounding frequency. - [Investment Compound Calculator](https://compoundwise.co.uk/compound-interest-calculator-investment): Investment-focused with contribution emphasis. - [Compound Interest with Inflation](https://compoundwise.co.uk/compound-interest-calculator-with-inflation): Adjusts projections for inflation to show real purchasing power. - [Retirement Compound Calculator](https://compoundwise.co.uk/retirement-compound-calculator): Retirement-focused projections. - [Compound Interest with Contributions](https://compoundwise.co.uk/compound-interest-calculator-with-contributions): Emphasises regular contribution modelling. - [Savings Goal Calculator](https://compoundwise.co.uk/savings-goal-calculator): Calculates how much to save monthly to reach a target. - [Investment Growth Calculator](https://compoundwise.co.uk/investment-growth-calculator): Projects investment portfolio growth over time. - [ISA Growth Calculator](https://compoundwise.co.uk/isa-growth-calculator): Models tax-free ISA growth within the UK ISA wrapper. - [Pension Growth Calculator](https://compoundwise.co.uk/pension-growth-calculator): Projects pension pot growth with employer contributions. - [Inflation Calculator UK](https://compoundwise.co.uk/inflation-calculator-uk): Shows how inflation erodes purchasing power over time. - [FIRE Calculator UK](https://compoundwise.co.uk/fire-calculator-uk): Financial Independence, Retire Early calculator for UK users. ## Guides - [What Is Compound Interest?](https://compoundwise.co.uk/what-is-compound-interest): Explains the concept with examples and the Rule of 72. - [Compound Interest Formula](https://compoundwise.co.uk/compound-interest-formula): The maths behind compound interest with worked examples. - [Compound vs Simple Interest](https://compoundwise.co.uk/compound-interest-vs-simple-interest): Side-by-side comparison of compound and simple interest. - [Investing for Beginners UK](https://compoundwise.co.uk/investing-for-beginners-uk): Step-by-step guide for first-time UK investors. - [Best ISA for Beginners UK](https://compoundwise.co.uk/best-isa-for-beginners-uk): Compares beginner-friendly stocks and shares ISAs. - [ISA Allowance 2025-26](https://compoundwise.co.uk/isa-allowance-2025-26): Current UK ISA allowance limits and rules. - [ISA vs Pension](https://compoundwise.co.uk/isa-vs-pension): Compares ISAs and pensions for long-term saving. - [Cash ISA vs Stocks and Shares ISA](https://compoundwise.co.uk/cash-isa-vs-stocks-and-shares-isa): Helps decide between cash and investment ISAs. - [Best Investment Platforms UK](https://compoundwise.co.uk/best-investment-platforms-uk): Reviews top UK investment platforms by fees and features. - [Trading 212 Review UK](https://compoundwise.co.uk/trading-212-review-uk): In-depth review of Trading 212 for UK investors. - [Trading 212 vs Vanguard](https://compoundwise.co.uk/trading-212-vs-vanguard): Head-to-head platform comparison. - [How to Invest £100 a Month UK](https://compoundwise.co.uk/how-to-invest-100-a-month-uk): Practical guide to starting with £100/month. - [How Much to Invest Per Month UK](https://compoundwise.co.uk/how-much-to-invest-per-month-uk): Guidelines for monthly investment amounts by income. - [Pound Cost Averaging](https://compoundwise.co.uk/pound-cost-averaging): Explains the DCA strategy and its benefits. - [Savings vs Investing](https://compoundwise.co.uk/savings-vs-investing): When to save in cash vs invest in the market. - [Investing in Your 20s UK](https://compoundwise.co.uk/investing-in-your-20s-uk): Age-specific investing advice for 20-somethings. - [Investing in Your 30s UK](https://compoundwise.co.uk/investing-in-your-30s-uk): Investing strategies for your 30s. - [Investing in Your 40s UK](https://compoundwise.co.uk/investing-in-your-40s-uk): Catch-up investing strategies for your 40s. - [How Much to Save for Retirement UK](https://compoundwise.co.uk/how-much-to-save-for-retirement-uk): UK retirement savings targets and planning. - [How Much Is Enough to Retire UK](https://compoundwise.co.uk/how-much-is-enough-to-retire-uk): FIRE number and retirement sufficiency guide. - [Workplace Pension Explained UK](https://compoundwise.co.uk/workplace-pension-explained-uk): Guide to UK auto-enrolment workplace pensions. - [How Much Interest on £100k](https://compoundwise.co.uk/how-much-interest-on-100k): Shows returns on a £100,000 lump sum at various rates. - [How Much Interest on £50k](https://compoundwise.co.uk/how-much-interest-on-50k): Shows returns on a £50,000 lump sum. - [How Much Interest on £10k](https://compoundwise.co.uk/how-much-interest-on-10k): Shows returns on a £10,000 lump sum. - [What to Do with £10,000 UK](https://compoundwise.co.uk/what-to-do-with-10000-uk): Options for investing or saving a £10k windfall. - [Investing vs Property UK](https://compoundwise.co.uk/investing-vs-property-uk): Compares stock market investing with buy-to-let property. - [Premium Bonds vs Investing](https://compoundwise.co.uk/premium-bonds-vs-investing): Compares NS&I Premium Bonds with index fund investing. - [Too Late to Start Investing?](https://compoundwise.co.uk/too-late-to-start-investing): Encouragement and strategies for late starters. - [How Much to Save by 30 UK](https://compoundwise.co.uk/how-much-to-save-by-30-uk): Savings benchmarks for age 30. - [How Much to Save by 40 UK](https://compoundwise.co.uk/how-much-to-save-by-40-uk): Savings benchmarks for age 40. ## Scenarios Interactive "what if" calculators with pre-filled values: ### Monthly Investment Amounts - [Invest £50/month](https://compoundwise.co.uk/scenario/invest-50-per-month) - [Invest £100/month](https://compoundwise.co.uk/scenario/invest-100-per-month) - [Invest £200/month](https://compoundwise.co.uk/scenario/invest-200-per-month) - [Invest £300/month](https://compoundwise.co.uk/scenario/invest-300-per-month) - [Invest £500/month](https://compoundwise.co.uk/scenario/invest-500-per-month) - [Invest £750/month](https://compoundwise.co.uk/scenario/invest-750-per-month) - [Invest £1,000/month](https://compoundwise.co.uk/scenario/invest-1000-per-month) - [Invest £1,500/month](https://compoundwise.co.uk/scenario/invest-1500-per-month) - [Invest £2,000/month](https://compoundwise.co.uk/scenario/invest-2000-per-month) ### Lump Sum Investments - [Invest £5,000 Lump Sum](https://compoundwise.co.uk/scenario/invest-5000-lump-sum) - [Invest £10,000 Lump Sum](https://compoundwise.co.uk/scenario/invest-10000-lump-sum) - [Invest £25,000 Lump Sum](https://compoundwise.co.uk/scenario/invest-25000-lump-sum) - [Invest £50,000 Lump Sum](https://compoundwise.co.uk/scenario/invest-50000-lump-sum) - [Invest £100,000 Lump Sum](https://compoundwise.co.uk/scenario/invest-100000-lump-sum) ### Savings Goals - [Save for Emergency Fund](https://compoundwise.co.uk/scenario/save-for-emergency-fund) - [Save for House Deposit](https://compoundwise.co.uk/scenario/save-for-house-deposit) - [Save £25k](https://compoundwise.co.uk/scenario/save-25k) - [Save £50k](https://compoundwise.co.uk/scenario/save-50k) - [Save £100k](https://compoundwise.co.uk/scenario/save-100k) - [Save £250k](https://compoundwise.co.uk/scenario/save-250k) - [Save £500k](https://compoundwise.co.uk/scenario/save-500k) - [Save £750k](https://compoundwise.co.uk/scenario/save-750k) - [Save £1 Million](https://compoundwise.co.uk/scenario/save-1-million) ### Retirement Targets - [Retire at 50](https://compoundwise.co.uk/scenario/retirement-at-50) - [Retire at 55](https://compoundwise.co.uk/scenario/retirement-at-55) - [Retire at 60](https://compoundwise.co.uk/scenario/retirement-at-60) - [Retire at 65](https://compoundwise.co.uk/scenario/retirement-at-65) ### UK ISA Scenarios - [ISA Savings Calculator](https://compoundwise.co.uk/scenario/isa-savings-calculator) - [Lifetime ISA Calculator](https://compoundwise.co.uk/scenario/lifetime-isa-calculator) - [Junior ISA Calculator](https://compoundwise.co.uk/scenario/junior-isa-calculator) ### Time Horizons - [Compound Interest over 5 Years](https://compoundwise.co.uk/scenario/compound-interest-5-years) - [Compound Interest over 10 Years](https://compoundwise.co.uk/scenario/compound-interest-10-years) - [Compound Interest over 15 Years](https://compoundwise.co.uk/scenario/compound-interest-15-years) - [Compound Interest over 20 Years](https://compoundwise.co.uk/scenario/compound-interest-20-years) - [Compound Interest over 30 Years](https://compoundwise.co.uk/scenario/compound-interest-30-years) - [Compound Interest over 40 Years](https://compoundwise.co.uk/scenario/compound-interest-40-years) ## About CompoundWise is an independent UK personal finance education site. All calculators are free, with no login required. Content is for educational purposes and does not constitute financial advice. The site is not regulated by the FCA. - Domain: compoundwise.co.uk - Sitemap: https://compoundwise.co.uk/sitemap.xml - Contact: via the [About page](https://compoundwise.co.uk/about)