Syed Waleed
50 new online tools
Added 11 November 2026. Browse by category and try a worked example on any tool page.
Math & Geometry
Arithmetic Sequence Calculator
Find a term and the partial sum of a sequence with a constant difference.
Math & GeometryCircle Sector Calculator
Find arc length and sector area from a central angle.
Math & GeometryCone Volume and Area
Calculate a right cone’s volume and total surface area.
Math & GeometryEllipse Area Calculator
Calculate area and approximate perimeter from the semi-axes.
Math & GeometryGeometric Sequence Calculator
Find a term and partial sum of a sequence with a constant ratio.
Math & GeometryRectangular Prism Calculator
Find the volume, surface area and space diagonal of a box.
Math & GeometryRegular Polygon Calculator
Find perimeter, area and interior angle from side length and count.
Math & GeometrySphere Volume and Area
Find volume and surface area from a radius.
Math & GeometryTrapezoid Area Calculator
Calculate area from the two parallel sides and perpendicular height.
Math & GeometryTriangle Heron Calculator
Calculate triangle area using three side lengths.
Date & Time
Batch Processing Time Estimator
Estimate elapsed time for equal-duration jobs on parallel workers.
Date & TimeDate Range Overlap Calculator
Find shared calendar dates between two inclusive ranges.
Date & TimeDay of Year Finder
Find the ordinal day and how many days follow it in the year.
Date & TimeLeap Year Checker
Check whether a Gregorian year contains February 29.
Date & TimeMonth Calendar Generator
Build a copyable Monday-first text calendar for a month.
Date & TimePlayback Time Savings
Compare original watch time with watch time at a selected playback speed.
Date & TimeQuarter Date Finder
Find a date’s calendar quarter and its first and last dates.
Date & TimeSplit Duration Into Blocks
Divide a total duration into full work blocks and leftover minutes.
Date & TimeWeekday Count by Date Range
Count each weekday in an inclusive date range.
Date & TimeWeekday Occurrence Finder
List every occurrence of one weekday in a month.
Electronics & Energy
Battery Bank Configuration
Estimate nominal voltage and capacity for identical batteries in series and parallel.
Electronics & EnergyCapacitor Energy Calculator
Calculate energy and charge stored in a capacitor.
Electronics & EnergyDecibel Power Ratio
Calculate decibels and power ratio from two power readings.
Electronics & EnergyFrequency and Wavelength
Convert a frequency into wavelength for a specified wave speed.
Electronics & EnergyInductor Energy Calculator
Calculate energy stored in an ideal inductor.
Electronics & EnergyLC Resonance Calculator
Find the ideal resonant frequency of an inductor-capacitor circuit.
Electronics & EnergyPulley Speed Ratio
Find driven pulley speed from two diameters and driver speed.
Electronics & EnergyPWM Duty Cycle Calculator
Find duty cycle and average voltage of an ideal rectangular signal.
Electronics & EnergyRC Cutoff Frequency
Calculate the cutoff frequency of an ideal first-order RC filter.
Electronics & EnergyWatt Hours and Amp Hours
Convert between Wh and Ah at a specified voltage.
Text Tools
Find Text Positions
List one-based character positions of a literal match.
Text ToolsInterleave Two Lists
Alternate lines from two lists and append remaining items.
Text ToolsLine Length Report
List the length of each line and identify the longest line.
Text ToolsLine Slice Tool
Keep an inclusive range of lines by line number.
Text ToolsPrefix Suffix Remover
Remove one exact prefix and suffix from each line.
Text ToolsRemove Repeated Adjacent Words
Collapse immediately repeated words in a line.
Text ToolsRepeat Text Generator
Repeat a text snippet with a chosen separator.
Text ToolsReverse Line Order
Reverse the order of lines while preserving the text inside each line.
Text ToolsSurround Text Generator
Wrap the entire input in literal opening and closing strings.
Text ToolsText Line Frequency
Count how often each exact line occurs.
Design & CSS
CSS Column Layout Generator
Set multi-column text width, count and gap.
Design & CSSCSS Fluid Spacing Generator
Create a clamp expression that scales spacing between two viewport widths.
Design & CSSCSS Focus Ring Generator
Create a visible keyboard focus outline.
Design & CSSCSS Grid Span Calculator
Calculate one grid item’s width from columns and gaps.
Design & CSSCSS Line Clamp Generator
Generate CSS to truncate long previews after a fixed number of lines.
Design & CSSCSS Object Position Generator
Position a cropped image inside a fixed media box.
Design & CSSCSS Outline Generator
Build an outline declaration with style, color and spacing.
Design & CSSCSS Scroll Snap Generator
Build scroll-snap CSS for a row or column of items.
Design & CSSCSS Sticky Position Generator
Generate sticky positioning with a chosen top offset.
Design & CSSCSS Transform Origin Generator
Set a transform pivot with horizontal and vertical percentages.