Free calculator for The Forge Roblox game. Calculate crafting costs, upgrade success rates, and trading profits. Optimize your gameplay with item tier analysis, material cost estimation, and market tax calculations.

Calculate return on investment (ROI) for trade school vs 4-year college. Compare total costs, graduation rates, time to degree, starting salaries, and lifetime earnings for electrician, plumber, HVAC, welding, nursing, and other skilled trades. Determine payback period and break-even point with 2025 tuition data and job market statistics.

Convert A1C (HbA1c) percentage to estimated average glucose (eAG) using ADA formula: eAG = 28.7 × A1C - 46.7. Input A1C value (4.0-15.0%) and instantly see eAG in mg/dL and mmol/L, diabetes risk category (Normal <5.7%, Prediabetes 5.7-6.4%, Diabetes ≥6.5%), target A1C recommendations, glucose reduction needed, and months to target. Includes 4 view modes: Calculator, Analysis (risk assessment), Ranges (ADA guidelines), and Guide (lifestyle management). Essential for diabetes monitoring, treatment adjustment, and blood sugar control optimization.

Age-based allowance calculator using $1-per-year formula. Calculate weekly/monthly/yearly allowance by child age (4-18), include chore bonuses ($0.50/chore), adjust for regional cost of living (80-130%), apply 80/20 savings split, get age-appropriate chore lists, financial literacy milestones, hybrid chore-based vs unconditional allowance models, and transition strategies to teenage monthly budgets.

Calculate serum anion gap (AG) and albumin-corrected anion gap using Na⁺, Cl⁻, HCO₃⁻ electrolyte values. Formula: AG = Na - (Cl + HCO₃), normal range 8-12 mEq/L (traditional) or 3-11 mEq/L (modern without K⁺). Input sodium (135-145), chloride (96-106), bicarbonate (22-28), albumin (3.5-5.0 g/dL) and instantly see standard AG, corrected AG (adds 2.5 mEq/L per 1 g/dL albumin below 4.0), diagnostic category (Normal/High AG metabolic acidosis/Low AG), differential diagnosis (MUDPILES mnemonic), and compensation analysis. Essential for ICU/ER acid-base disorders, DKA, lactic acidosis, renal failure, and toxic ingestions.

Baby formula calculator by age using AAP 2.5 oz/lb guidelines. Calculate daily formula needs (max 32 oz), determine feeding frequency by age (8x newborn → 4x at 6+ months), compare formula costs (powder $0.12/oz vs concentrate $0.18/oz vs ready-to-feed $0.30/oz = $1,200/year savings), get safe preparation guides, water safety rules (boiling, Cronobacter prevention), storage times (2 hours room temp, 24 hours refrigerated), transition timeline (solids at 6 months, whole milk at 12 months), special formula options (soy/hypoallergenic), and WIC cost-saving strategies.

Calculate 2025 backdoor Roth IRA contributions: Convert $7,000 traditional IRA ($8,000 if 50+) to Roth via non-deductible contribution + immediate conversion. Estimate pro-rata tax rule impact (taxable portion = pre-tax IRA balance ÷ total IRA × conversion), conversion tax liability (ordinary income rate 10-37%), 5-year rule for qualified withdrawals. Ideal for high earners exceeding Roth income limits ($161k single, $240k married 2025). Avoid penalties, track Form 8606 (non-deductible basis), calculate break-even vs taxable account.

Calculate bitumen/asphalt quantities, material costs, and project expenses for paving (driveways, roads, parking lots) and roofing applications. Input area dimensions (feet/meters), thickness (inches/mm), select from 5 bitumen grades (Pen 40/50 to MC-30), adjust waste factor (5-25%), and get instant breakdowns: bitumen weight (tons/kg), aggregate weight, mix composition (5-8% bitumen, 92-95% aggregate), coverage rates (sq ft per ton), labor costs ($20-25/m²), equipment costs, and total project budget. Compare paving vs. roofing applications with industry-standard densities (2200-2400 kg/m³) for accurate 2025 material estimates.