diff --git a/content/SUMMARY.md b/content/SUMMARY.md
index b796e8c..e6b4aa8 100644
--- a/content/SUMMARY.md
+++ b/content/SUMMARY.md
@@ -10,6 +10,7 @@
         - [DJI FPV configuration](ardupilot/dji-fpv-configuration.md)
         - [Miscellaneous notes](ardupilot/miscellaneous-notes.md)
         - [Reverse thrust](ardupilot/reverse-thrust.md)
+        - [Statistics calculator](ardupilot/statistics-calculator.md)
         - [TECS tuning calculator](ardupilot/tecs-tuning-calculator.md)
         - [Transfer config between craft](ardupilot/transfer-config-between-craft.md)
         - [Tuning the TECS](ardupilot/tuning-the-tecs.md)
diff --git a/content/ardupilot/index.md b/content/ardupilot/index.md
index 77894f7..1454959 100644
--- a/content/ardupilot/index.md
+++ b/content/ardupilot/index.md
@@ -9,6 +9,7 @@ Click on a link in the list below to go to that page:
 1. [DJI FPV configuration](../../ardupilot/dji-fpv-configuration.html)
 1. [Miscellaneous notes](../../ardupilot/miscellaneous-notes.html)
 1. [Reverse thrust](../../ardupilot/reverse-thrust.html)
+1. [Statistics calculator](../../ardupilot/statistics-calculator.html)
 1. [TECS tuning calculator](../../ardupilot/tecs-tuning-calculator.html)
 1. [Transfer config between craft](../../ardupilot/transfer-config-between-craft.html)
 1. [Tuning the TECS](../../ardupilot/tuning-the-tecs.html)
diff --git a/content/ardupilot/statistics-calculator.md b/content/ardupilot/statistics-calculator.md
new file mode 100644
index 0000000..5041119
--- /dev/null
+++ b/content/ardupilot/statistics-calculator.md
@@ -0,0 +1,138 @@
+# Statistics calculator
+
+<script type="text/javascript">
+    function raw(val){
+    		return val;
+    	}
+    	function ms_to_kph(val){
+    		return parseInt(val*3.6);
+    	}
+    	function m_to_km(val){
+    		return (val/1000).toFixed(2);
+    	}
+    	function sec_to_min(val){
+    		return parseInt(val/60);
+    	}
+    
+    
+    	function parseStats() {
+    
+    		var stats = {
+    			"STAT_ASPD_AVG":    { func: "ms_to_kph", "text": "Average air speed", "unit": "km/h"},
+    			"STAT_ASPD_MAX":    { func: "ms_to_kph", "text": "Maximum air speed", "unit": "km/h"},
+    			"STAT_GSPD_AVG":    { func: "ms_to_kph", "text": "Average ground speed", "unit": "km/h"},
+    			"STAT_GSPD_MAX":    { func: "ms_to_kph", "text": "Maximum ground speed", "unit": "km/h"},
+    			"STAT_WSPD_AVG":    { func: "ms_to_kph", "text": "Average wind speed", "unit": "km/h"},
+    			"STAT_WSPD_MAX":    { func: "ms_to_kph", "text": "Maximum wind speed", "unit": "km/h"},
+    			"STAT_TRAVEL_AIR":  { func: "m_to_km", "text": "Air distance traveled", "unit": "km"},
+    			"STAT_TRAVEL_GND":  { func: "m_to_km", "text": "Ground distance traveled", "unit": "km"},
+    			"STAT_HOMEALT_MAX": { func: "raw", "text": "Maximum altitude relative to home", "unit": "m"},
+    			"STAT_HOMEDST_MAX": { func: "m_to_km", "text": "Maximum distance from to home", "unit": "km"},
+    			"STAT_CURRENT_AVG": { func: "raw", "text": "Average current", "unit": "A"},
+    			"STAT_CURRENT_MAX": { func: "raw", "text": "Maximum current", "unit": "A"},
+    			"STAT_POWER_AVG":   { func: "raw", "text": "Average power", "unit": "W"},
+    			"STAT_POWER_MAX":   { func: "raw", "text": "Maximum power", "unit": "W"},
+    			"STAT_FLT_ENERGY":  { func: "raw", "text": "Consumed energy", "unit": "Wh"},
+    			"STAT_RUN_TIME":    { func: "sec_to_min", "text": "Total run time", "unit": "minutes"},
+    			"STAT_FLT_TIME":    { func: "sec_to_min", "text": "Total flight time", "unit": "minutes"}
+    		};
+    
+    		document.getElementById("result").innerHTML=""
+    		var txt = document.getElementById("stats").value
+    		var tbl = document.createElement('table');
+    		var tbdy = document.createElement('tbody');
+    
+    		for (const key in stats){
+    			var tr = document.createElement('tr');
+    			// find the parameter in the textblock
+    			var re = new RegExp(`${key}([^\D+])(.+)`,'g')
+    			var matches = txt.match(re) +''
+    			// extract the value
+    			var value = matches.match(/\d+/)
+    			var desc = stats[key]['text']
+    			var unit = stats[key]['unit']
+    			var func = stats[key]['func']
+    			// run the defined function with the value
+    			var out = window[func](value);
+    
+    			var td = document.createElement('td');
+    			td.appendChild(document.createTextNode(desc))
+    			tr.appendChild(td)
+    
+    			var td = document.createElement('td');
+    			td.appendChild(document.createTextNode(out + " "+ unit))
+    			td.style = "text-align:right"
+    			tr.appendChild(td)
+    
+    			//save output for average calculations
+    			stats[key]['out'] = out
+    
+    			tbdy.appendChild(tr);
+    		}
+    		tbl.appendChild(tbdy);
+    
+    	    var tr = document.createElement('tr');
+    		var td = document.createElement('td');
+            td.appendChild(document.createTextNode("Average air efficiency"))
+            tr.appendChild(td)
+    
+    		var td = document.createElement('td');
+            td.appendChild(document.createTextNode((stats["STAT_FLT_ENERGY"]["out"]/stats["STAT_TRAVEL_AIR"]["out"]).toFixed(2) + " Wh/km"))
+    		td.style = "text-align:right"
+            tr.appendChild(td)
+    	    tbdy.appendChild(tr);
+    
+    	    var tr = document.createElement('tr');
+    		var td = document.createElement('td');
+            td.appendChild(document.createTextNode("Average flight time efficiency"))
+            tr.appendChild(td)
+    
+    		var td = document.createElement('td');
+            td.appendChild(document.createTextNode(((stats["STAT_FLT_TIME"]["out"]*60)/stats["STAT_FLT_ENERGY"]["out"]).toFixed(2) + " s/Wh"))
+    		td.style = "text-align:right"
+            tr.appendChild(td)
+    	    tbdy.appendChild(tr);
+    
+    		document.getElementById("result").appendChild(tbl)
+    	}
+</script>
+
+Paste your `STATS` items (you can get them with `parachute show -f STAT_`) here:
+
+<div><textarea id="stats" name="text" cols="30" rows="8">
+STAT_ASPD_AVG    15.243167
+STAT_ASPD_MAX    36.461681
+STAT_BOOT_CNT    65.000000
+STAT_CURRENT_AVG 3.061170
+STAT_CURRENT_MAX 11.686898
+STAT_FLT_CNT     18.000000
+STAT_FLT_ENERGY  118.639687
+STAT_FLT_TIME    12486.000000
+STAT_GSPD_AVG    14.964579
+STAT_GSPD_MAX    37.131924
+STAT_HOMEALT_MAX 2456.000000
+STAT_HOMEDST_AVG 104.000000
+STAT_HOMEDST_MAX 3796.000000
+STAT_LOAD        0.000000
+STAT_POWER_AVG   36.397156
+STAT_POWER_MAX   136.568756
+STAT_RESET       1.000000
+STAT_RUN_TIME    27828.000000
+STAT_TRAVEL_AIR  189796.000000
+STAT_TRAVEL_GND  186942.000000
+STAT_WSPD_AVG    4.371937
+STAT_WSPD_MAX    18.140949
+</textarea></div>
+
+<div><input type="button" id="do" value="format" onclick="parseStats();"></div>
+<div id="result"></div>
+
+
+_(Many thanks to mfoos for writing this note.)_
+
+* * *
+
+<p style="font-size:80%; font-style: italic">
+Last updated on May 28, 2022. For any questions/feedback,
+email me at <a href="mailto:hi@stavros.io">hi@stavros.io</a>.
+</p>