All tools
Free calculators, converters, and utilities from Soliviqo, organized by category.
Dates & time
Calculate date differences, exact age, countdowns, and worked hours. You will also find a stopwatch and timer for measuring intervals on the spot. Useful when you need a clear answer without a spreadsheet.
- Days between datesEnter two dates and get the difference in days, weeks, and months.
- Exact ageCalculate exact age in years, months, and days from a date of birth.
- Add or subtract daysAdd or subtract days from a date and see the resulting weekday.
- Countdown to a dateSee how long remains until a future date or time, with a live countdown.
- Weekdays between datesCount Monday–Friday days between two dates, without excluding holidays.
- Hours workedCalculate hours worked from clock-in, clock-out, and break time.
- Weeks and months between datesExpress the difference between two dates in weeks, months, and other useful forms.
- Hours and minutes calculatorAdd or subtract durations in hours and minutes without doing it by hand.
- Countdown generatorCreate a countdown with an optional name for an event or deadline.
- StopwatchMeasure elapsed time with start, pause, reset, and optional laps.
- TimerSet hours, minutes, and seconds, then run a countdown with an alert when it ends.
Mathematics
Solve percentages, discounts, rule of three, averages, fractions, and proportions. These tools cover everyday study, shopping, and work calculations. Enter your numbers and get the answer instantly.
- PercentagesFind X% of an amount, what percent one value is of another, or raise and lower by a percent.
- DiscountsApply a discount to a price and get the savings and final price.
- Rule of threeSolve a direct proportion: if A is to B, find X from C.
- Percent changeCalculate the absolute and percent change between a starting and ending value.
- Average (mean)Calculate the average of a list of numbers, plus sum, minimum, and maximum.
- Percentage between two numbersFind what percentage one number is of another.
- FractionsAdd, subtract, multiply, or divide fractions and simplify the result.
- ProportionsSolve equivalent proportions and find the missing value.
Money
Estimate compound interest, business margins, tips, and bill splitting. You can also compare unit prices between products. Built for quick saving and selling decisions, without a spreadsheet.
- Tip calculatorCalculate the tip, the total, and how much each person pays.
- Compound interestEstimate final capital with compound interest and optional regular contributions.
- Split billSplit a bill among several people, with an optional tip.
- Unit priceCompare two products by unit price and see which is cheaper.
- Margin and profitCalculate profit, margin, and markup from cost and selling price.
Converters
Convert length, weight, temperature, speed, area, volume, and digital storage. Each converter shows the equivalent value in the most common units. Handy for cooking, travel, study, or technical work.
- Temperature converterConvert temperatures between Celsius, Fahrenheit, and Kelvin instantly.
- Length converterConvert lengths between metres, kilometres, feet, inches, and more instantly.
- Weight converterConvert weight and mass between kilograms, grams, pounds, ounces, and tons.
- Digital storageConvert digital storage between B, kB, MB, GB and also KiB/MiB/GiB.
- Volume converterConvert volumes between litres, millilitres, cubic metres, and US gallons.
- Speed converterConvert speeds between km/h, mph, m/s, and knots instantly.
- Area converterConvert areas between square metres, hectares, acres, and more units.
Text & digital
Count words, change letter case, remove duplicates, and sort lists in your browser. You can also generate passwords and calculate aspect ratios. Everything runs on your device—no text is sent to a server.
- Password generatorGenerate random passwords with configurable length and character types.
- Word counterCount words, characters, lines, and paragraphs in a text in real time.
- Aspect ratioCalculate the missing width or height when resizing while keeping the aspect ratio.
- Case converterChange text to upper case, lower case, title case, or sentence case.
- Sort listsSort a list alphabetically or numerically, ascending or descending.
- Remove duplicate linesRemove duplicate lines from a list and keep the original order if you need it.
Travel & auto
Calculate trip fuel cost, consumption in L/100 km, and cost per kilometre. Useful for planning car trips or comparing what your vehicle really costs to run. Use distance, consumption, and fuel price.