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  • Compound Interest Calculator
    Enter principal, annual rate, years, and compounding (annual to daily) to get final amount and total interest earned—plan your savings growth.
  • Inflation Calculator
    Enter a starting amount, start and end year, and an average annual inflation rate to get the total and percentage change for your selected period.
  • Character Counter
    Easily count the number of characters, words, and lines in your text with this free online character counter tool. Perfect for writers, students, and professionals who need to track text length.
  • Simple Interest Calculator
    Compute simple interest from principal, rate, and years. See interest earned and total amount instantly to plan loans or savings.
  • Running Pace Calculator
    Enter distance and finish time to calculate running pace per kilometer and per mile, plus speed in km/h and mph—plan training and race goals.
  • CIDR Calculator
    Calculate CIDR notation quickly and accurately with this CIDR Calculator. Input your CIDR notation to determine IP address range, subnet mask, and network details effortlessly.
  • Fuel Cost Calculator
    Fuel cost calculator is a tool used to estimate the total cost of fuel for a given journey, vehicle, or period.
  • Savings Interest Calculator
    Enter your initial deposit, annual interest rate, and months to see total interest, final balance, average monthly interest, and effective APY.
  • Down Payment Calculator
    Calculate your total upfront costs including down payment and closing costs for any purchase. Our free calculator helps you plan your financing with monthly payment estimates.
  • Daily Interest Calculator
    Enter principal, annual interest rate, and number of days to get the daily rate, interest earned for the period, and total amount on a 365-day basis.
  • Break Even Calculator
    Enter fixed costs, variable cost per unit, and selling price to get your break-even point in units and sales, plus contribution margin and ratio.
  • Doubling Time Calculator
    Calculate doubling time easily with this calculator. Input initial amount and growth rate to determine how long it takes for a value to double. Essential for financial planning and growth analysis.
  • Credit Card Minimum Payment Calculator
    Enter your credit card balance, APR, and minimum payment percentage to see your minimum monthly payment, time to pay off, total interest, and total cost.
  • OpenAI Token Counter
    Paste your text and count tokens for OpenAI models. Select an encoding or a model (GPT-4, GPT-4o, GPT-3.5) to see token usage for your prompts.
  • IELTS Score Calculator
    Enter Listening, Reading, Writing and Speaking band scores, choose Academic or General Training, and get your overall IELTS band and level instantly.
  • Heptagon Area Calculator
    Calculate the area of a regular heptagon from side length. Enter a value and choose units (mm, cm, m, km, in, ft, yd, mi) to get the area instantly.
  • Backwards Tax Calculator
    Calculate pre-tax amount from a total with our Backwards Tax Calculator. Enter the after-tax amount and tax rate to find the original price before tax, tax amount, and effective tax rate instantly.
  • Post-Money Valuation Calculator
    Enter investment amount and investor equity to compute post- and pre-money valuation, plus founder's equity. Get instant results.
  • Pre-Money Valuation Calculator
    Calculate pre-money valuation accurately with this Pre-Money Valuation Calculator. Input investment amount and investor's equity percentage to determine your company's value before funding.
  • 401k Future Value Calculator
    Enter current age, retirement age, 401k balance, annual contribution, and expected return to estimate retirement value, contributions, and earnings.
  • ACFT Score Calculator
    Enter deadlift (lbs), standing power throw (m), hand‑release push-ups, sprint-drag-carry, plank, and 2‑mile run to get your total ACFT score.
  • Adsense Revenue Calculator
    Estimate AdSense earnings by entering daily page views, CTR, and CPC. Get estimated clicks plus daily, monthly, and yearly revenue in seconds.
  • Angular Velocity Calculator
    Calculate angular velocity easily with angle and time inputs. Convert degrees per second to radians for precise rotational speed measurements. Ideal for physics and engineering applications.
  • Anthropic Claude Calculator
    Enter prompt and completion token counts and choose Claude 3 Opus, Sonnet, or Haiku to instantly estimate your Anthropic API usage cost.
  • AP Chemistry Score Calculator
    Estimate your AP Chemistry exam score with our free calculator. Input your multiple-choice and free-response scores to get an instant AP score prediction on the 1-5 scale.

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