Everyday & Hobbies
Everyday and hobby tools: school grades and GPA, clothing, shoe and ring sizes, photography and video settings, music notes and tempos, crafts and other small calculations that come up at home. Each page shows the method it uses, so you can follow the answer.
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- BPM to Delay Calculator Convert a tempo (BPM) and note division into delay and echo time in milliseconds and hertz.
- Field of View Calculator Calculate the angle of view from focal length and sensor size, plus the frame width at a distance.
- Hyperfocal Distance Calculator Calculate the hyperfocal distance of a lens from focal length, aperture and circle of confusion.
- Reading Time Calculator Estimate how long a text takes to read from its word count.
- Zodiac Sign Calculator (Western + Chinese) Find your Western zodiac sign and your Chinese zodiac animal from your date of birth.
- Audio File Size Calculator Calculate the uncompressed audio file size from sample rate, bit depth, channels and duration.
- Resin Mix Calculator Split a total mix weight into resin and hardener parts by a mix ratio.
- Honor Roll Calculator Enter your course grades to get your average and find out whether you earn a High Honor (Takdir) or Honor (Teşekkür) certificate.
- Musical Note Frequency Calculator Calculate the frequency in hertz of any musical note in equal temperament, with adjustable A4 tuning.
- Pizza Party Calculator Works out how many pizzas to order for a party from the guest count, slices per guest, and slices per pizza, rounding up so everyone is fed.
- GPA Calculator Calculate your credit-weighted grade point average.
- Scrabble Word Score Calculator Calculate the Scrabble point value of any word using standard English letter values.
- Final Grade Calculator Calculate the grade you need on the final exam to reach your target.
- Music Transpose Calculator Transpose a musical note up or down by a number of semitones and get the new note and octave.
- Screen Dimensions Calculator Calculate screen width and height from diagonal size and aspect ratio.
- Chinese Zodiac Calculator Enter your year of birth to instantly discover your Chinese zodiac sign. The calculator returns your zodiac animal from the 12-year cycle (Rat, Ox, Tiger, Rabbit, Dragon, Snake, Horse, Goat, Monkey, Rooster, Dog, Pig), your governing element (Metal, Water, Wood, Fire or Earth) and your yin or yang polarity, all derived directly from the year you were born.
- Focal Ratio (f-number) Calculator Calculate the focal ratio (f-number) of a lens or telescope from focal length and aperture diameter.
- Test Score / Grade Calculator Calculate your percentage score and letter grade from correct answers.
- Frequency to Note Calculator Find the nearest musical note and cents deviation for any frequency, at adjustable A4 tuning.
- Time-Lapse Calculator Calculate the number of frames and final clip length for a time-lapse from shoot duration, interval and frame rate.
- 3D Print Filament Calculator Calculate the weight, volume and cost of a length of 3D printer filament from diameter and density.
- Love Calculator A fun love calculator that turns two names into a love-match percentage and a playful verdict. Just enter both names and find out how well you click. The result is deterministic, so the same two names always give the same score.
- Candle Burn Time Calculator Estimate the total burn time of a candle from its wax weight and burn rate.
- Megapixel Calculator Calculate the megapixel count of an image from its pixel width and height.
- Numerology Life Path Number Calculate your numerology life path number by summing the digits of your birth date (master numbers 11, 22, 33 kept).
- Exposure Value (EV) Calculator Calculate the exposure value (EV) from aperture, shutter speed and ISO, normalised to ISO 100.
- Sunny 16 Calculator Calculate the recommended shutter speed using the Sunny 16 rule from ISO and aperture.
- Course Grade Average Calculator Calculate your course average by weighting your midterm and final exam scores.
- Flesch Reading Ease Calculator Calculate the Flesch Reading Ease score and Flesch–Kincaid grade level of English text.
- Flesch-Kincaid Readability Calculator Compute the Flesch Reading Ease score and Flesch-Kincaid grade level of a passage of text.
- TV Viewing Distance Calculator Calculate the recommended TV viewing distance from screen size for 4K and 1080p.
- Podcast File Size Calculator Estimate a podcast or audio file size from its bitrate and duration.
- Depth of Field Calculator Calculate depth of field, near and far focus limits, and hyperfocal distance for a lens.
- Drinks Per Guest Calculator Estimate the total number of drinks to provide for a party from guest count, hours and drinks per guest per hour.
- Flash Guide Number Calculator Calculate flash-to-subject distance from a guide number and aperture (and the aperture for a distance).
- Semitone Frequency Calculator Find a note's frequency in Hz given its distance in semitones from A4 (440 Hz), using equal temperament.
- Crop Factor Equivalent Calculator Convert a lens focal length and aperture to their full-frame 35mm equivalents using your camera's crop factor.
- XP to Level Calculator Estimate the total experience needed to go from your current level to a target level when each level costs base×level XP.
- Birthstone Calculator Find the modern birthstone associated with any birth month, from garnet in January to turquoise in December. A quick reference for gifts, jewellery and birthday traditions.
- Wedding Favor Quantity Calculator Calculates how many wedding favors to order from your guest count plus an extra buffer percentage so you never run short.
- 3D Resin Volume Calculator Estimates the resin volume, mass, and cost needed for a 3D print of a given solid volume.
- Semester GPA Calculator Computes your semester grade point average on a 4.0 scale from each course's credits and grade.
- Mel to Hertz Converter Convert a pitch on the mel scale to frequency in hertz: f = 700(10^(m/2595) − 1). Used in audio and speech processing.
- Meat Per Person Calculator Calculate how much meat to buy for a gathering from the number of guests and a per-person serving size, in kilograms and grams. Plan your barbecue or dinner without over- or under-buying.
- Projector Throw Distance Calculator Calculate how far to place your projector from the screen using the screen size and the projector throw ratio.
- Wedding Seating Chart Calculator Works out how many tables you need for your wedding from guest count and seats per table, plus total capacity and empty seats.
- Anchor Rode Length Calculator Calculate how much anchor rode to deploy: (water depth + bow height) × scope ratio. Letting out the right scope keeps your boat securely anchored without dragging.
- Bucket List Pace Calculator Works out how many bucket-list items you need to complete per year to finish them all by a target age.
- Circle of Confusion Calculator Calculates the circle of confusion (CoC) for a sensor format from its diagonal and a chosen divisor.
- Video File Size Calculator Calculate a video file's size from its bitrate and duration.
- ND Filter Exposure Calculator Computes the corrected shutter speed when adding a neutral-density filter of a given number of stops.
- Lighting Ratio Calculator Computes the photographic lighting ratio and the difference in stops between the key and fill lights from their measured light levels.
- Time-Lapse Clip Length Calculator Calculates how long a time-lapse video will be from the number of frames captured and the playback frame rate.
- Stops of Light Calculator Finds the exposure difference in photographic stops between two light or exposure values, plus the brightness ratio.
- Note to Frequency Calculator Calculates the frequency in hertz for a musical note in equal temperament, with adjustable A4 tuning.
- Balloon Quantity Calculator Estimate how many balloons you need for a balloon garland based on the display length and balloons per foot.
- Macrame Cord Length Calculator Estimate the cord length per strand and total cord needed for a macrame project using the rule-of-thumb multiplier, with an option for folded cords.
- Party Beer Quantity Calculator Estimate how many beers to buy for a party from the number of guests, party length and drinks per hour, plus cases needed.
- Photo Booth Time Calculator Estimate how many photo booth sessions you can run during an event from the session length and changeover gap.
- Tempo to Hz Calculator Convert a musical tempo in BPM to a frequency in Hz for any note division, with the matching period in milliseconds.