UK Clear Blue Ovulation Calculator Estimate your fertile window, expected ovulation day, and ideal Clearblue testing start date based on your cycle details. First day of your last period Average cycle length (days) Usual period length (days) Cycle pattern Mostly…
UK Clean Spark Spread Calculator Estimate gross spark spread and clean spark spread for UK gas-fired generation using live-style assumptions for power, gas, heat rate, and carbon. UK Power Price (£/MWhe) Gas Price (enter value in selected unit) Gas Unit…
UK Class Calculator 2023 2024 Estimate your self-employed National Insurance Class 2 and Class 4 for 2023/24 and compare with 2024/25 rules. Tax year 2023/242024/25 Annual self-employed profits (£) Voluntary Class 2 if under threshold Yes, include voluntary Class 2…
UK CKD GFR Calculator Estimate eGFR with the modern CKD-EPI 2021 creatinine equation and interpret CKD stage with optional urine ACR context. Patient Inputs Age (years) Sex at birth FemaleMale Serum Creatinine Creatinine Unit µmol/Lmg/dL Urine ACR (mg/mmol, optional) Calculate…
UK CIS Tax Calculator Estimate CIS deductions from contractor payments and preview your potential Self Assessment position using current UK-style tax assumptions. CIS Deduction Inputs Invoice amount (£) Materials cost (£) CIS rate Registered subcontractor (20%)Unregistered subcontractor (30%)Gross payment status…
UK Chronological Age Calculator Calculate exact age in years, months, and days using UK date context. You can also compare your current age against average UK life expectancy. Date of Birth Calculate Age As Of Sex for life expectancy comparison…
UK Childcare Calculator Estimate your annual and monthly childcare costs after free hours and key government support schemes. Number of children in childcare Children eligible for free hours Paid childcare hours needed per child per week Weeks of childcare needed…
UK Child Weight Percentile Calculator Estimate your child’s weight percentile by age and sex using a growth-chart style model, then visualise where they sit against centile curves. Sex BoyGirl Age (years) Additional months Weight Weight unit kglb Calculate Percentile Reset…
UK Child Tax Credit Calculator Estimate your annual, monthly, and weekly Child Tax Credit based on key legacy Tax Credit rules. This is an educational estimator for budgeting and planning. Annual household income before tax (£) Total number of children…
UK Child Support Calculator Estimate weekly, monthly, and yearly child maintenance using current UK Child Maintenance Service style bands. Gross annual income (£) Number of children to support 1 child2 children3 children4 or more children Other children living with paying…