Calculate UK costs, savings and next steps in minutes
Free calculators with plain-English AI insights. Get instant numbers first, then choose whether to compare quotes or speak to a trusted UK partner.
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Featured high-value calculator
Solar Panel Savings Calculator
Estimate payback, annual savings and 25-year return using UK-specific assumptions, then compare quotes from MCS-certified installers if the numbers look worth exploring.
Start solar calculatorHow CalcAI makes money
Calculators stay free. If you choose to request quotes or an introduction, CalcAI may earn a referral fee from regulated or certified partners. Your calculator result is still shown before any contact details are requested.
High-value quote tools
For decisions where comparing providers can change the final cost.
Solar Panel Savings
Estimate annual savings, payback and 25-year return, then compare quotes from MCS-certified installers.
Heat Pump / BUS Grant
Model heat pump running costs and grant support before speaking with MCS-certified installers.
Stamp Duty Calculator
Calculate SDLT, LBTT or LTT, then compare conveyancing quotes for your purchase.
MTD Income Checker
Check when Making Tax Digital applies to you and get matched with ICAEW/ACCA-qualified accountants.
Money planning tools
For understanding tax, pay and pension trade-offs before taking advice.
Not just a number — an explanation
Every CalcAI tool can append a plain-English explanation to your result: what drives the figure, what assumptions matter, and what to check next. AI explanations are informational only and are not regulated financial advice.