diff --git a/math/calc/Makefile b/math/calc/Makefile
new file mode 100644
index 00000000..65dfefcb
--- /dev/null
+++ b/math/calc/Makefile
@@ -0,0 +1,33 @@
+PORTNAME=	calc
+PORTVERSION=	2.14.1.0
+DISTVERSIONPREFIX=	v
+CATEGORIES=	math
+
+MAINTAINER=	adamw@FreeBSD.org
+COMMENT=	Interactive CLI arbitrary-precision calculator
+WWW=		https://github.com/lcn2/calc
+
+USES=		gmake tar:bzip2 readline
+USE_GITHUB=	yes
+GH_ACCOUNT=	lcn2
+
+CONFLICTS_INSTALL=	schilyutils # bin/calc
+
+MAKE_JOBS_UNSAFE=	yes
+
+MAKE_ARGS=	DATADIR="${DATADIR}"
+TEST_TARGET=	check
+
+# We use Makefile.freebsd because Makefile.local is in .gitignore
+post-extract:
+	${SED} -e 's|%%CC%%|${CC}|; s|%%CFLAGS%%|${CFLAGS}|;' \
+		${FILESDIR}/Makefile.freebsd > ${WRKSRC}/Makefile.local
+# The upstream Makefiles are a mess. Bash is hardcoded in many files, and only
+# some of the Makefiles allow overrides. Plus, they error out if sed .bkp files exist.
+	${FIND} ${WRKSRC} -name 'Makefile*' \
+		| ${XARGS} ${REINPLACE_CMD} -i '' -e 's|/bin/bash|${SH}|'
+
+post-install:
+	cd ${STAGEDIR}${PREFIX} && ${STRIP_CMD} bin/calc lib/lib*.so
+
+.include <bsd.port.mk>
diff --git a/math/calc/distinfo b/math/calc/distinfo
new file mode 100644
index 00000000..d66a4a7e
--- /dev/null
+++ b/math/calc/distinfo
@@ -0,0 +1,3 @@
+TIMESTAMP = 1649433474
+SHA256 (lcn2-calc-v2.14.1.0_GH0.tar.gz) = 5e3f441d1f4fa727f374a8cf2b8298f9d42c05debef5879d216edcfd05dd474d
+SIZE (lcn2-calc-v2.14.1.0_GH0.tar.gz) = 1204812
diff --git a/math/calc/files/Makefile.freebsd b/math/calc/files/Makefile.freebsd
new file mode 100644
index 00000000..4e2b53f8
--- /dev/null
+++ b/math/calc/files/Makefile.freebsd
@@ -0,0 +1,19 @@
+# vim:ft=make
+ARCH_CFLAGS:=
+BINDIR:=	${PREFIX}/bin
+CALC_INCDIR:=	${PREFIX}/include/calc
+CALC_SHAREDIR:=	${DATADIR}
+CALCPAGER:=	more
+CC:=		%%CC%%
+CFLAGS:=	%%CFLAGS%% ${ICFLAGS} ${CCOPT}
+INCDIR:=	${LOCALBASE}/include
+LCC:=		%%CC%%
+LIBDIR:=	${PREFIX}/lib
+MANDIR:=	${PREFIX}/man/man1
+SCRIPTDIR:=	${PREFIX}/libexec/cscript
+T:=		${DESTDIR}
+USE_READLINE:=	-DUSE_READLINE -I${LOCALBASE}/include
+
+# These need to be in this order:
+READLINE_LIBS:=		-L${LOCALBASE}/lib -lreadline
+READLINE_EXTRAS:=	${READLINE_LIBS} -lhistory -lncurses
diff --git a/math/calc/files/patch-x-Makefile b/math/calc/files/patch-x-Makefile
new file mode 100644
index 00000000..dd826da1
--- /dev/null
+++ b/math/calc/files/patch-x-Makefile
@@ -0,0 +1,11 @@
+--- ./Makefile~	2022-09-17 17:04:25.328630000 +0200
++++ ./Makefile	2022-09-22 23:49:16.482922000 +0200
+@@ -1309,7 +1309,7 @@
+ 
+ # The default calc versions
+ #
+-VERSION= 2.14.1.0
++VERSION= 2
+ 
+ # Names of shared libraries with versions
+ #
diff --git a/math/calc/pkg-descr b/math/calc/pkg-descr
new file mode 100644
index 00000000..bb60c95a
--- /dev/null
+++ b/math/calc/pkg-descr
@@ -0,0 +1,8 @@
+Calc is an interactive calculator which provides for easy large
+numeric calculations, but which also can be easily programmed for
+difficult or long calculations.  It can accept a command line
+argument, in which case it executes that single command and exits.
+Otherwise, it enters interactive mode.  There are a great number
+of pre-defined functions.  The calculator can calculate transcendental
+functions, and accept and display numbers in real or exponential format.
+The calculator also knows about complex numbers.
diff --git a/math/calc/pkg-plist b/math/calc/pkg-plist
new file mode 100644
index 00000000..d8508260
--- /dev/null
+++ b/math/calc/pkg-plist
@@ -0,0 +1,512 @@
+bin/calc
+include/calc/alloc.h
+include/calc/attribute.h
+include/calc/banned.h
+include/calc/blkcpy.h
+include/calc/block.h
+include/calc/byteswap.h
+include/calc/calc.h
+include/calc/cmath.h
+include/calc/config.h
+include/calc/custom.h
+include/calc/decl.h
+include/calc/file.h
+include/calc/func.h
+include/calc/hash.h
+include/calc/hist.h
+include/calc/jump.h
+include/calc/label.h
+include/calc/lib_calc.h
+include/calc/lib_util.h
+include/calc/nametype.h
+include/calc/opcodes.h
+include/calc/prime.h
+include/calc/qmath.h
+include/calc/sha1.h
+include/calc/str.h
+include/calc/strl.h
+include/calc/symbol.h
+include/calc/token.h
+include/calc/value.h
+include/calc/zmath.h
+include/calc/zrand.h
+include/calc/zrandom.h
+lib/libcalc.so
+lib/libcalc.so.2.14.1.0
+lib/libcustcalc.so
+lib/libcustcalc.so.2.14.1.0
+libexec/cscript/4dsphere
+libexec/cscript/fproduct
+libexec/cscript/mersenne
+libexec/cscript/piforever
+libexec/cscript/plus
+libexec/cscript/powerterm
+libexec/cscript/simple
+libexec/cscript/square
+man/man1/calc.1.gz
+share/calc/alg_config.cal
+share/calc/beer.cal
+share/calc/bernoulli.cal
+share/calc/bernpoly.cal
+share/calc/bigprime.cal
+share/calc/bindings
+share/calc/brentsolve.cal
+share/calc/chi.cal
+share/calc/chrem.cal
+share/calc/constants.cal
+share/calc/custhelp/argv
+share/calc/custhelp/devnull
+share/calc/custhelp/help
+share/calc/custhelp/pmodm127
+share/calc/custhelp/pzasusb8
+share/calc/custhelp/register
+share/calc/custhelp/sysinfo
+share/calc/custom/argv.cal
+share/calc/custom/halflen.cal
+share/calc/custom/pmodm127.cal
+share/calc/custom/pzasusb8.cal
+share/calc/custom/register.cal
+share/calc/deg.cal
+share/calc/dms.cal
+share/calc/dotest.cal
+share/calc/ellip.cal
+share/calc/factorial.cal
+share/calc/factorial2.cal
+share/calc/gvec.cal
+share/calc/hello.cal
+share/calc/help/abs
+share/calc/help/access
+share/calc/help/acos
+share/calc/help/acosh
+share/calc/help/acot
+share/calc/help/acoth
+share/calc/help/acsc
+share/calc/help/acsch
+share/calc/help/address
+share/calc/help/agd
+share/calc/help/append
+share/calc/help/appr
+share/calc/help/archive
+share/calc/help/arg
+share/calc/help/argv
+share/calc/help/arrow
+share/calc/help/asec
+share/calc/help/asech
+share/calc/help/asin
+share/calc/help/asinh
+share/calc/help/assign
+share/calc/help/assoc
+share/calc/help/atan
+share/calc/help/atan2
+share/calc/help/atanh
+share/calc/help/avg
+share/calc/help/base
+share/calc/help/base2
+share/calc/help/bernoulli
+share/calc/help/binding
+share/calc/help/bindings
+share/calc/help/bit
+share/calc/help/blk
+share/calc/help/blkcpy
+share/calc/help/blkfree
+share/calc/help/blocks
+share/calc/help/bround
+share/calc/help/btrunc
+share/calc/help/bug
+share/calc/help/bugs
+share/calc/help/builtin
+share/calc/help/calc_tty
+share/calc/help/calclevel
+share/calc/help/calcpath
+share/calc/help/catalan
+share/calc/help/ceil
+share/calc/help/cfappr
+share/calc/help/cfsim
+share/calc/help/change
+share/calc/help/changes
+share/calc/help/char
+share/calc/help/cmdbuf
+share/calc/help/cmp
+share/calc/help/comb
+share/calc/help/command
+share/calc/help/config
+share/calc/help/conj
+share/calc/help/contrib
+share/calc/help/COPYING
+share/calc/help/COPYING-LGPL
+share/calc/help/cos
+share/calc/help/cosh
+share/calc/help/cot
+share/calc/help/coth
+share/calc/help/count
+share/calc/help/cp
+share/calc/help/credit
+share/calc/help/csc
+share/calc/help/csch
+share/calc/help/cscript
+share/calc/help/ctime
+share/calc/help/custom
+share/calc/help/custom_cal
+share/calc/help/d2dm
+share/calc/help/d2dms
+share/calc/help/d2g
+share/calc/help/d2r
+share/calc/help/define
+share/calc/help/delete
+share/calc/help/den
+share/calc/help/dereference
+share/calc/help/det
+share/calc/help/digit
+share/calc/help/digits
+share/calc/help/display
+share/calc/help/dms2d
+share/calc/help/dp
+share/calc/help/environment
+share/calc/help/epsilon
+share/calc/help/errcount
+share/calc/help/errmax
+share/calc/help/errno
+share/calc/help/error
+share/calc/help/errorcode
+share/calc/help/errorcodes
+share/calc/help/estr
+share/calc/help/euler
+share/calc/help/eval
+share/calc/help/exp
+share/calc/help/expression
+share/calc/help/fact
+share/calc/help/factor
+share/calc/help/fclose
+share/calc/help/fcnt
+share/calc/help/feof
+share/calc/help/ferror
+share/calc/help/fflush
+share/calc/help/fgetc
+share/calc/help/fgetfield
+share/calc/help/fgetfile
+share/calc/help/fgetline
+share/calc/help/fgets
+share/calc/help/fgetstr
+share/calc/help/fib
+share/calc/help/file
+share/calc/help/files
+share/calc/help/floor
+share/calc/help/fopen
+share/calc/help/forall
+share/calc/help/fpathopen
+share/calc/help/fprintf
+share/calc/help/fputc
+share/calc/help/fputs
+share/calc/help/fputstr
+share/calc/help/frac
+share/calc/help/free
+share/calc/help/freebernoulli
+share/calc/help/freeeuler
+share/calc/help/freeglobals
+share/calc/help/freeredc
+share/calc/help/freestatics
+share/calc/help/frem
+share/calc/help/freopen
+share/calc/help/fscan
+share/calc/help/fscanf
+share/calc/help/fseek
+share/calc/help/fsize
+share/calc/help/ftell
+share/calc/help/full
+share/calc/help/g2d
+share/calc/help/g2gm
+share/calc/help/g2gms
+share/calc/help/g2r
+share/calc/help/gcd
+share/calc/help/gcdrem
+share/calc/help/gd
+share/calc/help/getenv
+share/calc/help/gms2g
+share/calc/help/h2hm
+share/calc/help/h2hms
+share/calc/help/hash
+share/calc/help/head
+share/calc/help/help
+share/calc/help/highbit
+share/calc/help/history
+share/calc/help/hmean
+share/calc/help/hms2h
+share/calc/help/hnrmod
+share/calc/help/hypot
+share/calc/help/ilog
+share/calc/help/ilog10
+share/calc/help/ilog2
+share/calc/help/im
+share/calc/help/indices
+share/calc/help/inputlevel
+share/calc/help/insert
+share/calc/help/int
+share/calc/help/interrupt
+share/calc/help/intro
+share/calc/help/inverse
+share/calc/help/iroot
+share/calc/help/isalnum
+share/calc/help/isalpha
+share/calc/help/isassoc
+share/calc/help/isatty
+share/calc/help/isblk
+share/calc/help/iscntrl
+share/calc/help/isconfig
+share/calc/help/isdefined
+share/calc/help/isdigit
+share/calc/help/iserror
+share/calc/help/iseven
+share/calc/help/isfile
+share/calc/help/isgraph
+share/calc/help/ishash
+share/calc/help/isident
+share/calc/help/isint
+share/calc/help/islist
+share/calc/help/islower
+share/calc/help/ismat
+share/calc/help/ismult
+share/calc/help/isnull
+share/calc/help/isnum
+share/calc/help/isobj
+share/calc/help/isobjtype
+share/calc/help/isodd
+share/calc/help/isprime
+share/calc/help/isprint
+share/calc/help/isptr
+share/calc/help/ispunct
+share/calc/help/isqrt
+share/calc/help/isrand
+share/calc/help/israndom
+share/calc/help/isreal
+share/calc/help/isrel
+share/calc/help/issimple
+share/calc/help/isspace
+share/calc/help/issq
+share/calc/help/isstr
+share/calc/help/istype
+share/calc/help/isupper
+share/calc/help/isxdigit
+share/calc/help/jacobi
+share/calc/help/join
+share/calc/help/lcm
+share/calc/help/lcmfact
+share/calc/help/lfactor
+share/calc/help/libcalc
+share/calc/help/list
+share/calc/help/ln
+share/calc/help/log
+share/calc/help/lowbit
+share/calc/help/ltol
+share/calc/help/makelist
+share/calc/help/man
+share/calc/help/mat
+share/calc/help/matdim
+share/calc/help/matfill
+share/calc/help/matmax
+share/calc/help/matmin
+share/calc/help/matsum
+share/calc/help/mattrace
+share/calc/help/mattrans
+share/calc/help/max
+share/calc/help/memsize
+share/calc/help/meq
+share/calc/help/min
+share/calc/help/minv
+share/calc/help/mmin
+share/calc/help/mne
+share/calc/help/mod
+share/calc/help/modify
+share/calc/help/name
+share/calc/help/near
+share/calc/help/new_custom
+share/calc/help/newerror
+share/calc/help/nextcand
+share/calc/help/nextprime
+share/calc/help/norm
+share/calc/help/null
+share/calc/help/num
+share/calc/help/obj
+share/calc/help/oldvalue
+share/calc/help/operator
+share/calc/help/ord
+share/calc/help/overview
+share/calc/help/param
+share/calc/help/perm
+share/calc/help/pfact
+share/calc/help/pi
+share/calc/help/pix
+share/calc/help/places
+share/calc/help/pmod
+share/calc/help/polar
+share/calc/help/poly
+share/calc/help/pop
+share/calc/help/popcnt
+share/calc/help/pound
+share/calc/help/power
+share/calc/help/prevcand
+share/calc/help/prevprime
+share/calc/help/printf
+share/calc/help/prompt
+share/calc/help/protect
+share/calc/help/ptest
+share/calc/help/push
+share/calc/help/putenv
+share/calc/help/questions
+share/calc/help/quo
+share/calc/help/quomod
+share/calc/help/r2d
+share/calc/help/r2g
+share/calc/help/rand
+share/calc/help/randbit
+share/calc/help/random
+share/calc/help/randombit
+share/calc/help/randperm
+share/calc/help/rcin
+share/calc/help/rcmul
+share/calc/help/rcout
+share/calc/help/rcpow
+share/calc/help/rcsq
+share/calc/help/re
+share/calc/help/releases
+share/calc/help/remove
+share/calc/help/resource
+share/calc/help/reverse
+share/calc/help/rewind
+share/calc/help/rm
+share/calc/help/root
+share/calc/help/round
+share/calc/help/rsearch
+share/calc/help/runtime
+share/calc/help/saveval
+share/calc/help/scale
+share/calc/help/scan
+share/calc/help/scanf
+share/calc/help/script
+share/calc/help/search
+share/calc/help/sec
+share/calc/help/sech
+share/calc/help/seed
+share/calc/help/segment
+share/calc/help/select
+share/calc/help/sgn
+share/calc/help/sha1
+share/calc/help/sin
+share/calc/help/sinh
+share/calc/help/size
+share/calc/help/sizeof
+share/calc/help/sleep
+share/calc/help/sort
+share/calc/help/sqrt
+share/calc/help/srand
+share/calc/help/srandom
+share/calc/help/ssq
+share/calc/help/statement
+share/calc/help/stoponerror
+share/calc/help/str
+share/calc/help/strcasecmp
+share/calc/help/strcat
+share/calc/help/strcmp
+share/calc/help/strcpy
+share/calc/help/strerror
+share/calc/help/strlen
+share/calc/help/strncasecmp
+share/calc/help/strncmp
+share/calc/help/strncpy
+share/calc/help/strpos
+share/calc/help/strprintf
+share/calc/help/strscan
+share/calc/help/strscanf
+share/calc/help/strtolower
+share/calc/help/strtoupper
+share/calc/help/substr
+share/calc/help/sum
+share/calc/help/swap
+share/calc/help/system
+share/calc/help/systime
+share/calc/help/tail
+share/calc/help/tan
+share/calc/help/tanh
+share/calc/help/test
+share/calc/help/time
+share/calc/help/todo
+share/calc/help/trunc
+share/calc/help/type
+share/calc/help/types
+share/calc/help/unexpected
+share/calc/help/usage
+share/calc/help/usertime
+share/calc/help/variable
+share/calc/help/version
+share/calc/help/wishlist
+share/calc/help/xor
+share/calc/hms.cal
+share/calc/infinities.cal
+share/calc/intfile.cal
+share/calc/intnum.cal
+share/calc/lambertw.cal
+share/calc/linear.cal
+share/calc/lnseries.cal
+share/calc/lucas_chk.cal
+share/calc/lucas.cal
+share/calc/mersenne.cal
+share/calc/mfactor.cal
+share/calc/mod.cal
+share/calc/natnumset.cal
+share/calc/palindrome.cal
+share/calc/pell.cal
+share/calc/pi.cal
+share/calc/pix.cal
+share/calc/pollard.cal
+share/calc/poly.cal
+share/calc/prompt.cal
+share/calc/psqrt.cal
+share/calc/qtime.cal
+share/calc/quat.cal
+share/calc/randbitrun.cal
+share/calc/randmprime.cal
+share/calc/randombitrun.cal
+share/calc/randomrun.cal
+share/calc/randrun.cal
+share/calc/README
+share/calc/regress.cal
+share/calc/repeat.cal
+share/calc/screen.cal
+share/calc/seedrandom.cal
+share/calc/set8700.cal
+share/calc/set8700.line
+share/calc/smallfactors.cal
+share/calc/solve.cal
+share/calc/specialfunctions.cal
+share/calc/statistics.cal
+share/calc/strings.cal
+share/calc/sumsq.cal
+share/calc/sumtimes.cal
+share/calc/surd.cal
+share/calc/test1700.cal
+share/calc/test2300.cal
+share/calc/test2600.cal
+share/calc/test2700.cal
+share/calc/test3100.cal
+share/calc/test3300.cal
+share/calc/test3400.cal
+share/calc/test3500.cal
+share/calc/test4000.cal
+share/calc/test4100.cal
+share/calc/test4600.cal
+share/calc/test5100.cal
+share/calc/test5200.cal
+share/calc/test8400.cal
+share/calc/test8500.cal
+share/calc/test8600.cal
+share/calc/test8900.cal
+share/calc/toomcook.cal
+share/calc/unitfrac.cal
+share/calc/varargs.cal
+share/calc/xx_print.cal
+share/calc/zeta2.cal
+@dir include/calc
+@dir libexec/cscript
+@dir share/calc/custhelp
+@dir share/calc/custom
+@dir share/calc/help
+@dir share/calc