Everyday Calculators

ArrayKit's everyday calculators handle the small day-to-day jobs — work out a GPA or the grade you need on a final, plan a bedtime around sleep cycles, convert units like length, weight and temperature, translate shoe sizes between countries, roll dice or estimate a golf handicap. Each calculator runs entirely in your browser, so the details you enter stay on your device and nothing is uploaded. They give quick, practical answers with no setup, so you can get on with your day.

• GPA Calculator — Calculate your grade point average from course grades and credit hours.
• Grade Calculator — Compute a weighted course grade and the score needed on the final exam.
• Sleep Calculator — Find the best bedtimes or wake times based on 90-minute sleep cycles.
• Golf Handicap Calculator — Estimate a golf handicap index from your recent scores and course data.
• Dice Roller — Roll any number and type of dice (d4–d20) with modifiers and totals.
• Shoe Size Converter — Convert shoe sizes between US, UK, EU and centimeters for men and women.
• Bra Size Calculator — Estimate your bra size from band and bust measurements in US, UK and EU.
• Unit Conversion Calculator — Convert length, weight, temperature, volume, area, speed and more.
• Height Calculator — Convert height between feet/inches and cm, and predict a child’s adult height.
• Cooking Measurement Converter — Convert cups, spoons, millilitres, grams and ounces using ingredient density.
• Pet Age Calculator — Convert dog and cat years to human years using size-adjusted ageing curves.
• Ring Size Converter — Convert ring sizes between US, UK, EU, Japan, diameter and circumference.
• Clothing Size Converter — Convert women’s and men’s clothing sizes between US, UK, EU, Italian and French charts.
• Unit Price Calculator — Compare pack sizes by price per 100 g, 100 ml or piece and spot the real bargain.
• Chinese Zodiac Calculator — Your animal sign and element from your birth date, honouring Chinese New Year cutoffs.
• Recipe Scaler — Scale any recipe by servings, a multiplier or a change of pan size.
• Random Name Picker — Draw winners, shuffle a list or split teams, with a seed you can share.
• Coffee Ratio Calculator — Solve coffee, water or ratio for any brew method, in grams and cups.
• Hat Size Converter — Convert head circumference to US, UK, EU and S/M/L hat sizes.
• Pizza Size Calculator — Compare pizzas by area and price per square inch, and size an order for a group.

Frequently asked questions

Do I need to install anything to use these everyday calculators?

No. Every everyday calculator on ArrayKit runs directly in your browser, so there is nothing to install and the details you enter are processed locally on your device.

Do the everyday calculators send my information anywhere?

No. All of the math happens in your browser, so the values you type never leave your device or get uploaded to ArrayKit.

Which everyday calculators does ArrayKit offer?

The category includes academic tools (GPA, grade), lifestyle tools (sleep, golf handicap, dice roller), sizing tools (shoe size, bra size) and a general unit conversion calculator.

Can I use the everyday calculators on my phone?

Yes. They are lightweight and work in any modern mobile or desktop browser, and they keep working offline once the page has loaded.